Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6

* 'bkl-removal' of git://git.lwn.net/linux-2.6: (146 commits)
IB/umad: BKL is not needed for ib_umad_open()
IB/uverbs: BKL is not needed for ib_uverbs_open()
bf561-coreb: BKL unneeded for open()
Call fasync() functions without the BKL
snd/PCM: fasync BKL pushdown
ipmi: fasync BKL pushdown
ecryptfs: fasync BKL pushdown
Bluetooth VHCI: fasync BKL pushdown
tty_io: fasync BKL pushdown
tun: fasync BKL pushdown
i2o: fasync BKL pushdown
mpt: fasync BKL pushdown
Remove BKL from remote_llseek v2
Make FAT users happier by not deadlocking
x86-mce: BKL pushdown
vmwatchdog: BKL pushdown
vmcp: BKL pushdown
via-pmu: BKL pushdown
uml-random: BKL pushdown
uml-mmapper: BKL pushdown
...

arch/blackfin/mach-bf561/coreb.c

···
 	return ret;
 }
 
+/* No BKL needed here */
 static int coreb_open(struct inode *inode, struct file *file)
 {
 	spin_lock_irq(&coreb_lock);

arch/cris/arch-v10/drivers/eeprom.c

···
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
+#include <linux/smp_lock.h>
 #include <linux/wait.h>
 #include <asm/uaccess.h>
 #include "i2c.h"
···
 }
 
 /* Opens the device. */
-
 static int eeprom_open(struct inode * inode, struct file * file)
 {
-
+  cycle_kernel_lock();
   if(iminor(inode) != EEPROM_MINOR_NR)
      return -ENXIO;
   if(imajor(inode) != EEPROM_MAJOR_NR)

arch/cris/arch-v10/drivers/gpio.c

···
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/fs.h>
+#include <linux/smp_lock.h>
 #include <linux/string.h>
 #include <linux/poll.h>
 #include <linux/init.h>
···
 	if (!priv)
 		return -ENOMEM;
 
+	lock_kernel();
 	priv->minor = p;
 
 	/* initialize the io/alarm struct */
···
 	alarmlist = priv;
 	spin_unlock_irqrestore(&gpio_lock, flags);
 
+	unlock_kernel();
 	return 0;
 }
 

arch/cris/arch-v10/drivers/i2c.c

···
 #include <linux/module.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/fs.h>
···
 static int
 i2c_open(struct inode *inode, struct file *filp)
 {
+	cycle_kernel_lock();
 	return 0;
 }
 

arch/cris/arch-v10/drivers/sync_serial.c

···
 #include <linux/interrupt.h>
 #include <linux/poll.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 #include <linux/timer.h>
 #include <asm/irq.h>
 #include <asm/dma.h>
···
 	int dev = MINOR(inode->i_rdev);
 	struct sync_port *port;
 	int mode;
+	int err = -EBUSY;
 
+	lock_kernel();
 	DEBUG(printk(KERN_DEBUG "Open sync serial port %d\n", dev));
 
 	if (dev < 0 || dev >= NUMBER_OF_PORTS || !ports[dev].enabled) {
 		DEBUG(printk(KERN_DEBUG "Invalid minor %d\n", dev));
-		return -ENODEV;
+		err = -ENODEV;
+		goto out;
 	}
 	port = &ports[dev];
 	/* Allow open this device twice (assuming one reader and one writer) */
 	if (port->busy == 2) {
 		DEBUG(printk(KERN_DEBUG "Device is busy.. \n"));
-		return -EBUSY;
+		goto out;
 	}
 	if (port->init_irqs) {
 		if (port->use_dma) {
···
 						&ports[0])) {
 					printk(KERN_CRIT "Can't alloc "
 						"sync serial port 1 IRQ");
-					return -EBUSY;
+					goto out;
 				} else if (request_irq(25, rx_interrupt, 0,
 						"synchronous serial 1 dma rx",
 						&ports[0])) {
 					free_irq(24, &port[0]);
 					printk(KERN_CRIT "Can't alloc "
 						"sync serial port 1 IRQ");
-					return -EBUSY;
+					goto out;
 				} else if (cris_request_dma(8,
 						"synchronous serial 1 dma tr",
 						DMA_VERBOSE_ON_ERROR,
···
 					printk(KERN_CRIT "Can't alloc "
 						"sync serial port 1 "
 						"TX DMA channel");
-					return -EBUSY;
+					goto out;
 				} else if (cris_request_dma(9,
 						"synchronous serial 1 dma rec",
 						DMA_VERBOSE_ON_ERROR,
···
 					printk(KERN_CRIT "Can't alloc "
 						"sync serial port 1 "
 						"RX DMA channel");
-					return -EBUSY;
+					goto out;
 				}
 #endif
 				RESET_DMA(8); WAIT_DMA(8);
···
 						&ports[1])) {
 					printk(KERN_CRIT "Can't alloc "
 						"sync serial port 3 IRQ");
-					return -EBUSY;
+					goto out;
 				} else if (request_irq(21, rx_interrupt, 0,
 						"synchronous serial 3 dma rx",
 						&ports[1])) {
 					free_irq(20, &ports[1]);
 					printk(KERN_CRIT "Can't alloc "
 						"sync serial port 3 IRQ");
-					return -EBUSY;
+					goto out;
 				} else if (cris_request_dma(4,
 						"synchronous serial 3 dma tr",
 						DMA_VERBOSE_ON_ERROR,
···
 					printk(KERN_CRIT "Can't alloc "
 						"sync serial port 3 "
 						"TX DMA channel");
-					return -EBUSY;
+					goto out;
 				} else if (cris_request_dma(5,
 						"synchronous serial 3 dma rec",
 						DMA_VERBOSE_ON_ERROR,
···
 					printk(KERN_CRIT "Can't alloc "
 						"sync serial port 3 "
 						"RX DMA channel");
-					return -EBUSY;
+					goto out;
 				}
 #endif
 				RESET_DMA(4); WAIT_DMA(4);
···
 						&ports[0])) {
 					printk(KERN_CRIT "Can't alloc "
 						"sync serial manual irq");
-					return -EBUSY;
+					goto out;
 				}
 			} else if (port == &ports[1]) {
 				if (request_irq(8,
···
 						&ports[1])) {
 					printk(KERN_CRIT "Can't alloc "
 						"sync serial manual irq");
-					return -EBUSY;
+					goto out;
 				}
 			}
 			port->init_irqs = 0;
···
 			*R_IRQ_MASK1_SET = 1 << port->data_avail_bit;
 		DEBUG(printk(KERN_DEBUG "sser%d rec started\n", dev));
 	}
-	return 0;
+	ret = 0;
+	
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int sync_serial_release(struct inode *inode, struct file *file)

arch/cris/arch-v32/drivers/cryptocop.c

···
 #include <linux/string.h>
 #include <linux/fs.h>
 #include <linux/mm.h>
+#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/stddef.h>
 
···
 	return 0;
 }
 
-
 static int cryptocop_open(struct inode *inode, struct file *filp)
 {
 	int p = iminor(inode);
 
+	cycle_kernel_lock();
 	if (p != CRYPTOCOP_MINOR) return -EINVAL;
 
 	filp->private_data = NULL;

arch/cris/arch-v32/drivers/i2c.c

···
 #include <linux/fs.h>
 #include <linux/string.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 
 #include <asm/etraxi2c.h>
 
···
 static int
 i2c_open(struct inode *inode, struct file *filp)
 {
+	cycle_kernel_lock();
 	return 0;
 }
 

arch/cris/arch-v32/drivers/mach-a3/gpio.c

···
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 
 #include <asm/etraxgpio.h>
 #include <hwregs/reg_map.h>
···
 
 	if (!priv)
 		return -ENOMEM;
+
+	lock_kernel();
 	memset(priv, 0, sizeof(*priv));
 
 	priv->minor = p;
···
 		spin_unlock_irq(&gpio_lock);
 	}
 
+	unlock_kernel();
 	return 0;
 }
 

arch/cris/arch-v32/drivers/mach-fs/gpio.c

···
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 
 #include <asm/etraxgpio.h>
 #include <hwregs/reg_map.h>
···
 		return -EINVAL;
 
 	priv = kmalloc(sizeof(struct gpio_private), GFP_KERNEL);
-
 	if (!priv)
 		return -ENOMEM;
+
+	lock_kernel();
 	memset(priv, 0, sizeof(*priv));
 
 	priv->minor = p;
···
 	alarmlist = priv;
 	spin_unlock_irq(&alarm_lock);
 
+	unlock_kernel();
 	return 0;
 }
 

arch/cris/arch-v32/drivers/sync_serial.c

···
 #include <linux/major.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/interrupt.h>
 #include <linux/poll.h>
 #include <linux/init.h>
···
 static int sync_serial_open(struct inode *inode, struct file *file)
 {
 	int dev = iminor(inode);
+	int ret = -EBUSY;
 	sync_port *port;
 	reg_dma_rw_cfg cfg = {.en = regk_dma_yes};
 	reg_dma_rw_intr_mask intr_mask = {.data = regk_dma_yes};
 
+	lock_kernel();
 	DEBUG(printk(KERN_DEBUG "Open sync serial port %d\n", dev));
 
 	if (dev < 0 || dev >= NBR_PORTS || !ports[dev].enabled)
 	{
 		DEBUG(printk(KERN_DEBUG "Invalid minor %d\n", dev));
-		return -ENODEV;
+		ret = -ENODEV;
+		goto out;
 	}
 	port = &ports[dev];
 	/* Allow open this device twice (assuming one reader and one writer) */
 	if (port->busy == 2)
 	{
 		DEBUG(printk(KERN_DEBUG "Device is busy.. \n"));
-		return -EBUSY;
+		goto out;
 	}
 
 
···
 						"synchronous serial 0 dma tr",
 						&ports[0])) {
 					printk(KERN_CRIT "Can't allocate sync serial port 0 IRQ");
-					return -EBUSY;
+					goto out;
 				} else if (request_irq(DMA_IN_INTR_VECT,
 						rx_interrupt,
 						0,
···
 						&ports[0])) {
 					free_irq(DMA_OUT_INTR_VECT, &port[0]);
 					printk(KERN_CRIT "Can't allocate sync serial port 0 IRQ");
-					return -EBUSY;
+					goto out;
 				} else if (crisv32_request_dma(OUT_DMA_NBR,
 						"synchronous serial 0 dma tr",
 						DMA_VERBOSE_ON_ERROR,
···
 					free_irq(DMA_OUT_INTR_VECT, &port[0]);
 					free_irq(DMA_IN_INTR_VECT, &port[0]);
 					printk(KERN_CRIT "Can't allocate sync serial port 0 TX DMA channel");
-					return -EBUSY;
+					goto out;
 				} else if (crisv32_request_dma(IN_DMA_NBR,
 						"synchronous serial 0 dma rec",
 						DMA_VERBOSE_ON_ERROR,
···
 					free_irq(DMA_OUT_INTR_VECT, &port[0]);
 					free_irq(DMA_IN_INTR_VECT, &port[0]);
 					printk(KERN_CRIT "Can't allocate sync serial port 1 RX DMA channel");
-					return -EBUSY;
+					goto out;
 				}
 #endif
 			}
···
 						"synchronous serial 1 dma tr",
 						&ports[1])) {
 					printk(KERN_CRIT "Can't allocate sync serial port 1 IRQ");
-					return -EBUSY;
+					goto out;
 				} else if (request_irq(DMA7_INTR_VECT,
 						       rx_interrupt,
 						       0,
···
 						       &ports[1])) {
 					free_irq(DMA6_INTR_VECT, &ports[1]);
 					printk(KERN_CRIT "Can't allocate sync serial port 3 IRQ");
-					return -EBUSY;
+					goto out;
 				} else if (crisv32_request_dma(
 						SYNC_SER1_TX_DMA_NBR,
 						"synchronous serial 1 dma tr",
···
 					free_irq(DMA6_INTR_VECT, &ports[1]);
 					free_irq(DMA7_INTR_VECT, &ports[1]);
 					printk(KERN_CRIT "Can't allocate sync serial port 3 TX DMA channel");
-					return -EBUSY;
+					goto out;
 				} else if (crisv32_request_dma(
 						SYNC_SER1_RX_DMA_NBR,
 						"synchronous serial 3 dma rec",
···
 					free_irq(DMA6_INTR_VECT, &ports[1]);
 					free_irq(DMA7_INTR_VECT, &ports[1]);
 					printk(KERN_CRIT "Can't allocate sync serial port 3 RX DMA channel");
-					return -EBUSY;
+					goto out;
 				}
 #endif
 			}
···
 						"synchronous serial manual irq",
 						&ports[0])) {
 					printk("Can't allocate sync serial manual irq");
-					return -EBUSY;
+					goto out;
 				}
 			}
 #ifdef CONFIG_ETRAXFS
···
 						"synchronous serial manual irq",
 						&ports[1])) {
 					printk(KERN_CRIT "Can't allocate sync serial manual irq");
-					return -EBUSY;
+					goto out;
 				}
 			}
 #endif
···
 	} /* port->init_irqs */
 
 	port->busy++;
-	return 0;
+	ret = 0;
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int sync_serial_release(struct inode *inode, struct file *file)

arch/m68k/bvme6000/rtc.c

···
 #include <linux/errno.h>
 #include <linux/miscdevice.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/ioport.h>
 #include <linux/capability.h>
 #include <linux/fcntl.h>
···
 
 static int rtc_open(struct inode *inode, struct file *file)
 {
-	if(rtc_status)
+	lock_kernel();
+	if(rtc_status) {
+		unlock_kernel();
 		return -EBUSY;
+	}
 
 	rtc_status = 1;
+	unlock_kernel();
 	return 0;
 }
 

arch/m68k/mvme16x/rtc.c

···
 #include <linux/errno.h>
 #include <linux/miscdevice.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/ioport.h>
 #include <linux/capability.h>
 #include <linux/fcntl.h>
···
 
 static int rtc_open(struct inode *inode, struct file *file)
 {
+	lock_kernel();
 	if( !atomic_dec_and_test(&rtc_ready) )
 	{
 		atomic_inc( &rtc_ready );
+		unlock_kernel();
 		return -EBUSY;
 	}
+	unlock_kernel();
 
 	return 0;
 }

arch/mips/basler/excite/excite_iodev.c

···
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/miscdevice.h>
+#include <linux/smp_lock.h>
 
 #include "excite_iodev.h"
 
···
 
 static int iodev_open(struct inode *i, struct file *f)
 {
-	return request_irq(iodev_irq, iodev_irqhdl, IRQF_DISABLED,
+	int ret;
+
+	lock_kernel();
+	ret = request_irq(iodev_irq, iodev_irqhdl, IRQF_DISABLED,
 			   iodev_name, &miscdev);
+	unlock_kernel();
+
+	return ret;
 }
 
 static int iodev_release(struct inode *i, struct file *f)

arch/mips/kernel/rtlx.c

···
 #include <linux/vmalloc.h>
 #include <linux/elf.h>
 #include <linux/seq_file.h>
+#include <linux/smp_lock.h>
 #include <linux/syscalls.h>
 #include <linux/moduleloader.h>
 #include <linux/interrupt.h>
···
 static int file_open(struct inode *inode, struct file *filp)
 {
 	int minor = iminor(inode);
+	int err;
 
-	return rtlx_open(minor, (filp->f_flags & O_NONBLOCK) ? 0 : 1);
+	lock_kernel();
+	err = rtlx_open(minor, (filp->f_flags & O_NONBLOCK) ? 0 : 1);
+	unlock_kernel();
+	return err;
 }
 
 static int file_release(struct inode *inode, struct file *filp)

arch/mips/kernel/vpe.c

···
 #include <linux/vmalloc.h>
 #include <linux/elf.h>
 #include <linux/seq_file.h>
+#include <linux/smp_lock.h>
 #include <linux/syscalls.h>
 #include <linux/moduleloader.h>
 #include <linux/interrupt.h>
···
 	enum vpe_state state;
 	struct vpe_notifications *not;
 	struct vpe *v;
-	int ret;
+	int ret, err = 0;
 
+	lock_kernel();
 	if (minor != iminor(inode)) {
 		/* assume only 1 device at the moment. */
 		printk(KERN_WARNING "VPE loader: only vpe1 is supported\n");
-		return -ENODEV;
+		err = -ENODEV;
+		goto out;
 	}
 
 	if ((v = get_vpe(tclimit)) == NULL) {
 		printk(KERN_WARNING "VPE loader: unable to get vpe\n");
-		return -ENODEV;
+		err = -ENODEV;
+		goto out;
 	}
 
 	state = xchg(&v->state, VPE_STATE_INUSE);
···
 	v->shared_ptr = NULL;
 	v->__start = 0;
 
+out:
+	unlock_kernel();
 	return 0;
 }
 

arch/mips/sibyte/common/sb_tbprof.c

···
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/vmalloc.h>
 #include <linux/fs.h>
 #include <linux/errno.h>
···
 static int sbprof_tb_open(struct inode *inode, struct file *filp)
 {
 	int minor;
+	int err = 0;
 
+	lock_kernel();
 	minor = iminor(inode);
-	if (minor != 0)
-		return -ENODEV;
+	if (minor != 0) {
+		err = -ENODEV;
+		goto out;
+	}
 
-	if (xchg(&sbp.open, SB_OPENING) != SB_CLOSED)
-		return -EBUSY;
+	if (xchg(&sbp.open, SB_OPENING) != SB_CLOSED) {
+		err = -EBUSY;
+		goto out;
+	}
 
 	memset(&sbp, 0, sizeof(struct sbprof_tb));
 	sbp.sbprof_tbbuf = vmalloc(MAX_TBSAMPLE_BYTES);
-	if (!sbp.sbprof_tbbuf)
-		return -ENOMEM;
+	if (!sbp.sbprof_tbbuf) {
+		err = -ENOMEM;
+		goto out;
+	}
 	memset(sbp.sbprof_tbbuf, 0, MAX_TBSAMPLE_BYTES);
 	init_waitqueue_head(&sbp.tb_sync);
 	init_waitqueue_head(&sbp.tb_read);
···
 
 	sbp.open = SB_OPEN;
 
-	return 0;
+  out:
+	unlock_kernel();
+	return err;
 }
 
 static int sbprof_tb_release(struct inode *inode, struct file *filp)

arch/parisc/kernel/perf.c

···
 #include <linux/init.h>
 #include <linux/proc_fs.h>
 #include <linux/miscdevice.h>
+#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 
 #include <asm/uaccess.h>
···
  */
 static int perf_open(struct inode *inode, struct file *file)
 {
+	lock_kernel();
 	spin_lock(&perf_lock);
 	if (perf_enabled) {
 		spin_unlock(&perf_lock);
+		unlock_kernel();
 		return -EBUSY;
 	}
 	perf_enabled = 1;
  	spin_unlock(&perf_lock);
+	unlock_kernel();
 
 	return 0;
 }

arch/s390/crypto/prng.c

···
 #include <linux/fs.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/smp_lock.h>
 #include <linux/miscdevice.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
···
 
 static int prng_open(struct inode *inode, struct file *file)
 {
+	cycle_kernel_lock();
 	return nonseekable_open(inode, file);
 }
 

arch/sh/boards/landisk/gio.c

···
  */
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 #include <linux/kdev_t.h>
 #include <linux/cdev.h>
 #include <linux/fs.h>
···
 static int gio_open(struct inode *inode, struct file *filp)
 {
 	int minor;
+	int ret = -ENOENT;
 
+	lock_kernel();
 	minor = MINOR(inode->i_rdev);
 	if (minor < DEVCOUNT) {
 		if (openCnt > 0) {
-			return -EALREADY;
+			ret = -EALREADY;
 		} else {
 			openCnt++;
-			return 0;
+			ret = 0;
 		}
 	}
-	return -ENOENT;
+	unlock_kernel();
+	return ret;
 }
 
 static int gio_close(struct inode *inode, struct file *filp)

arch/sparc/kernel/apc.c

···
 #include <linux/errno.h>
 #include <linux/init.h>
 #include <linux/miscdevice.h>
+#include <linux/smp_lock.h>
 #include <linux/pm.h>
 
 #include <asm/io.h>
···
 
 static int apc_open(struct inode *inode, struct file *f)
 {
+	cycle_kernel_lock();
 	return 0;
 }
 

arch/sparc64/kernel/time.c

···
 #include <linux/errno.h>
 #include <linux/module.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include <linux/kernel.h>
 #include <linux/param.h>
 #include <linux/string.h>
···
 
 static int mini_rtc_open(struct inode *inode, struct file *file)
 {
-	if (mini_rtc_status & RTC_IS_OPEN)
+	lock_kernel();
+	if (mini_rtc_status & RTC_IS_OPEN) {
+		unlock_kernel();
 		return -EBUSY;
+	}
 
 	mini_rtc_status |= RTC_IS_OPEN;
+	unlock_kernel();
 
 	return 0;
 }

arch/um/drivers/harddog_kern.c

···
 	int err = -EBUSY;
 	char *sock = NULL;
 
+	lock_kernel();
 	spin_lock(&lock);
 	if(timer_alive)
 		goto err;
···
 
 	timer_alive = 1;
 	spin_unlock(&lock);
+	unlock_kernel();
 	return nonseekable_open(inode, file);
 err:
 	spin_unlock(&lock);
+	unlock_kernel();
 	return err;
 }
 

arch/um/drivers/mmapper_kern.c

···
 #include <linux/miscdevice.h>
 #include <linux/module.h>
 #include <linux/mm.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include "mem_user.h"
 
···
 
 static int mmapper_open(struct inode *inode, struct file *file)
 {
+	cycle_kernel_lock();
 	return 0;
 }
 

arch/um/drivers/random.c

···
  * of the GNU General Public License, incorporated herein by reference.
  */
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include <linux/module.h>
 #include <linux/fs.h>
 #include <linux/interrupt.h>
···
 
 static int rng_dev_open (struct inode *inode, struct file *filp)
 {
+	cycle_kernel_lock();
+
 	/* enforce read-only access to this chrdev */
 	if ((filp->f_mode & FMODE_READ) == 0)
 		return -EINVAL;

arch/x86/kernel/apm_32.c

···
 #include <linux/module.h>
 
 #include <linux/poll.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/stddef.h>
 #include <linux/timer.h>
···
 {
 	struct apm_user *as;
 
+	lock_kernel();
 	as = kmalloc(sizeof(*as), GFP_KERNEL);
 	if (as == NULL) {
 		printk(KERN_ERR "apm: cannot allocate struct of size %d bytes\n",
 		       sizeof(*as));
+		       unlock_kernel();
 		return -ENOMEM;
 	}
 	as->magic = APM_BIOS_MAGIC;
···
 	user_list = as;
 	spin_unlock(&user_list_lock);
 	filp->private_data = as;
+	unlock_kernel();
 	return 0;
 }
 

arch/x86/kernel/cpu/mcheck/mce_64.c

···
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include <linux/string.h>
 #include <linux/rcupdate.h>
 #include <linux/kallsyms.h>
···
 
 static int mce_open(struct inode *inode, struct file *file)
 {
+	lock_kernel();
 	spin_lock(&mce_state_lock);
 
 	if (open_exclu || (open_count && (file->f_flags & O_EXCL))) {
 		spin_unlock(&mce_state_lock);
+		unlock_kernel();
 		return -EBUSY;
 	}
 
···
 	open_count++;
 
 	spin_unlock(&mce_state_lock);
+	unlock_kernel();
 
 	return nonseekable_open(inode, file);
 }

arch/x86/kernel/cpuid.c

···
 #include <linux/init.h>
 #include <linux/poll.h>
 #include <linux/smp.h>
+#include <linux/smp_lock.h>
 #include <linux/major.h>
 #include <linux/fs.h>
 #include <linux/smp_lock.h>
···
 
 static int cpuid_open(struct inode *inode, struct file *file)
 {
-	unsigned int cpu = iminor(file->f_path.dentry->d_inode);
-	struct cpuinfo_x86 *c = &cpu_data(cpu);
+	unsigned int cpu;
+	struct cpuinfo_x86 *c;
+	int ret = 0;
+	
+	lock_kernel();
 
-	if (cpu >= NR_CPUS || !cpu_online(cpu))
-		return -ENXIO;	/* No such CPU */
+	cpu = iminor(file->f_path.dentry->d_inode);
+	if (cpu >= NR_CPUS || !cpu_online(cpu)) {
+		ret = -ENXIO;	/* No such CPU */
+		goto out;
+	}
+	c = &cpu_data(cpu);
 	if (c->cpuid_level < 0)
-		return -EIO;	/* CPUID not supported */
-
-	return 0;
+		ret = -EIO;	/* CPUID not supported */
+out:
+	unlock_kernel();
+	return ret;
 }
 
 /*

arch/x86/kernel/microcode.c

···
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include <linux/cpumask.h>
 #include <linux/module.h>
 #include <linux/slab.h>
···
 
 static int microcode_open (struct inode *unused1, struct file *unused2)
 {
+	cycle_kernel_lock();
 	return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
 }
 

arch/x86/kernel/msr.c

···
 {
 	unsigned int cpu = iminor(file->f_path.dentry->d_inode);
 	struct cpuinfo_x86 *c = &cpu_data(cpu);
+	int ret = 0;
 
-	if (cpu >= NR_CPUS || !cpu_online(cpu))
-		return -ENXIO;	/* No such CPU */
+	lock_kernel();
+	cpu = iminor(file->f_path.dentry->d_inode);
+
+	if (cpu >= NR_CPUS || !cpu_online(cpu)) {
+		ret = -ENXIO;	/* No such CPU */
+		goto out;
+	}
+	c = &cpu_data(cpu);
 	if (!cpu_has(c, X86_FEATURE_MSR))
-		return -EIO;	/* MSR not supported */
-
+		ret = -EIO;	/* MSR not supported */
+out:
+	unlock_kernel();
 	return 0;
 }
 

block/bsg.c

···
 #include <linux/uio.h>
 #include <linux/idr.h>
 #include <linux/bsg.h>
+#include <linux/smp_lock.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_ioctl.h>
···
 
 static int bsg_open(struct inode *inode, struct file *file)
 {
-	struct bsg_device *bd = bsg_get_device(inode, file);
+	struct bsg_device *bd;
+
+	lock_kernel();
+	bd = bsg_get_device(inode, file);
+	unlock_kernel();
 
 	if (IS_ERR(bd))
 		return PTR_ERR(bd);

drivers/block/aoe/aoechr.c

···
 #include <linux/hdreg.h>
 #include <linux/blkdev.h>
 #include <linux/delay.h>
+#include <linux/smp_lock.h>
 #include "aoe.h"
 
 enum {
···
 {
 	int n, i;
 
+	lock_kernel();
 	n = iminor(inode);
 	filp->private_data = (void *) (unsigned long) n;
 
 	for (i = 0; i < ARRAY_SIZE(chardevs); ++i)
-		if (chardevs[i].minor == n)
+		if (chardevs[i].minor == n) {
+			unlock_kernel();
 			return 0;
+		}
+	unlock_kernel();
 	return -EINVAL;
 }
 

drivers/block/paride/pg.c

···
 #include <linux/pg.h>
 #include <linux/device.h>
 #include <linux/sched.h>	/* current, TASK_* */
+#include <linux/smp_lock.h>
 #include <linux/jiffies.h>
 
 #include <asm/uaccess.h>
···
 {
 	int unit = iminor(inode) & 0x7f;
 	struct pg *dev = &devices[unit];
+	int ret = 0;
 
-	if ((unit >= PG_UNITS) || (!dev->present))
-		return -ENODEV;
+	lock_kernel();
+	if ((unit >= PG_UNITS) || (!dev->present)) {
+		ret = -ENODEV;
+		goto out;
+	}
 
-	if (test_and_set_bit(0, &dev->access))
-		return -EBUSY;
+	if (test_and_set_bit(0, &dev->access)) {
+		ret = -EBUSY;
+		goto out;
+	}
 
 	if (dev->busy) {
 		pg_reset(dev);
···
 	if (dev->bufptr == NULL) {
 		clear_bit(0, &dev->access);
 		printk("%s: buffer allocation failed\n", dev->name);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto out;
 	}
 
 	file->private_data = dev;
 
-	return 0;
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int pg_release(struct inode *inode, struct file *file)

drivers/block/paride/pt.c

···
 	struct pt_unit *tape = pt + unit;
 	int err;
 
-	if (unit >= PT_UNITS || (!tape->present))
+	lock_kernel();
+	if (unit >= PT_UNITS || (!tape->present)) {
+		unlock_kernel();
 		return -ENODEV;
+	}
 
 	err = -EBUSY;
 	if (!atomic_dec_and_test(&tape->available))
···
 	}
 
 	file->private_data = tape;
+	unlock_kernel();
 	return 0;
 
 out:
 	atomic_inc(&tape->available);
+	unlock_kernel();
 	return err;
 }
 

drivers/bluetooth/hci_vhci.c

···
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
···
 	skb_queue_head_init(&data->readq);
 	init_waitqueue_head(&data->read_wait);
 
+	lock_kernel();
 	hdev = hci_alloc_dev();
 	if (!hdev) {
 		kfree(data);
+		unlock_kernel();
 		return -ENOMEM;
 	}
 
···
 		BT_ERR("Can't register HCI device");
 		kfree(data);
 		hci_free_dev(hdev);
+		unlock_kernel();
 		return -EBUSY;
 	}
 
 	file->private_data = data;
+	unlock_kernel();
 
 	return nonseekable_open(inode, file);
 }
···
 static int vhci_fasync(int fd, struct file *file, int on)
 {
 	struct vhci_data *data = file->private_data;
-	int err;
+	int err = 0;
 
+	lock_kernel();
 	err = fasync_helper(fd, file, on, &data->fasync);
 	if (err < 0)
-		return err;
+		goto out;
 
 	if (on)
 		data->flags |= VHCI_FASYNC;
 	else
 		data->flags &= ~VHCI_FASYNC;
 
-	return 0;
+out:
+	unlock_kernel();
+	return err;
 }
 
 static const struct file_operations vhci_fops = {

drivers/char/agp/frontend.c

···
 #include <linux/mm.h>
 #include <linux/fs.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
 #include "agp.h"
···
 	struct agp_client *client;
 	int rc = -ENXIO;
 
+	lock_kernel();
 	mutex_lock(&(agp_fe.agp_mutex));
 
 	if (minor != AGPGART_MINOR)
···
 	agp_insert_file_private(priv);
 	DBG("private=%p, client=%p", priv, client);
 	mutex_unlock(&(agp_fe.agp_mutex));
+	unlock_kernel();
 	return 0;
 
 err_out_nomem:
 	rc = -ENOMEM;
 err_out:
 	mutex_unlock(&(agp_fe.agp_mutex));
+	unlock_kernel();
 	return rc;
 }
 

drivers/char/apm-emulation.c

···
 #include <linux/module.h>
 #include <linux/poll.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/miscdevice.h>
···
 {
 	struct apm_user *as;
 
+	lock_kernel();
 	as = kzalloc(sizeof(*as), GFP_KERNEL);
 	if (as) {
 		/*
···
 
 		filp->private_data = as;
 	}
+	unlock_kernel();
 
 	return as ? 0 : -ENOMEM;
 }

drivers/char/briq_panel.c

···
 
 #include <linux/module.h>
 
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/tty.h>
···
 
 static int briq_panel_open(struct inode *ino, struct file *filep)
 {
-	/* enforce single access */
-	if (vfd_is_open)
+	lock_kernel();
+	/* enforce single access, vfd_is_open is protected by BKL */
+	if (vfd_is_open) {
+		unlock_kernel();
 		return -EBUSY;
+	}
 	vfd_is_open = 1;
 
+	unlock_kernel();
 	return 0;
 }
 

drivers/char/cs5535_gpio.c

···
 #include <linux/cdev.h>
 #include <linux/ioport.h>
 #include <linux/pci.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 
···
 {
 	u32 m = iminor(inode);
 
+	cycle_kernel_lock();
 	/* the mask says which pins are usable by this driver */
 	if ((mask & (1 << m)) == 0)
 		return -EINVAL;

drivers/char/ds1286.c

···
  * option) any later version.
  */
 #include <linux/ds1286.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/miscdevice.h>
···
 
 static int ds1286_open(struct inode *inode, struct file *file)
 {
+	lock_kernel();
 	spin_lock_irq(&ds1286_lock);
 
 	if (ds1286_status & RTC_IS_OPEN)
···
 	ds1286_status |= RTC_IS_OPEN;
 
 	spin_unlock_irq(&ds1286_lock);
+	unlock_kernel();
 	return 0;
 
 out_busy:
 	spin_lock_irq(&ds1286_lock);
+	unlock_kernel();
 	return -EBUSY;
 }
 

drivers/char/ds1620.c

···
 #include <linux/proc_fs.h>
 #include <linux/capability.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 
 #include <asm/hardware.h>
 #include <asm/mach-types.h>
···
 	therm->hi = cvt_9_to_int(ds1620_in(THERM_READ_TH, 9));
 }
 
+static int ds1620_open(struct inode *inode, struct file *file)
+{
+	cycle_kernel_lock();
+	return nonseekable_open(inode, file);
+}
+
 static ssize_t
 ds1620_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
 {
···
 
 static const struct file_operations ds1620_fops = {
 	.owner		= THIS_MODULE,
-	.open		= nonseekable_open,
+	.open		= ds1620_open,
 	.read		= ds1620_read,
 	.ioctl		= ds1620_ioctl,
 };

drivers/char/dsp56k.c

···
 #include <linux/mm.h>
 #include <linux/init.h>
 #include <linux/device.h>
+#include <linux/smp_lock.h>
 
 #include <asm/atarihw.h>
 #include <asm/traps.h>
···
 static int dsp56k_open(struct inode *inode, struct file *file)
 {
 	int dev = iminor(inode) & 0x0f;
+	int ret = 0;
 
+	lock_kernel();
 	switch(dev)
 	{
 	case DSP56K_DEV_56001:
 
-		if (test_and_set_bit(0, &dsp56k.in_use))
-			return -EBUSY;
+		if (test_and_set_bit(0, &dsp56k.in_use)) {
+			ret = -EBUSY;
+			goto out;
+		}
 
 		dsp56k.timeout = TIMEOUT;
 		dsp56k.maxio = MAXIO;
···
 		break;
 
 	default:
-		return -ENODEV;
+		ret = -ENODEV;
 	}
-
-	return 0;
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int dsp56k_release(struct inode *inode, struct file *file)

drivers/char/dtlk.c

···
 #include <linux/errno.h>	/* for -EBUSY */
 #include <linux/ioport.h>	/* for request_region */
 #include <linux/delay.h>	/* for loops_per_jiffy */
+#include <linux/smp_lock.h>	/* cycle_kernel_lock() */
 #include <asm/io.h>		/* for inb_p, outb_p, inb, outb, etc. */
 #include <asm/uaccess.h>	/* for get_user, etc. */
 #include <linux/wait.h>		/* for wait_queue */
···
 	}
 }
 
+/* Note that nobody ever sets dtlk_busy... */
 static int dtlk_open(struct inode *inode, struct file *file)
 {
 	TRACE_TEXT("(dtlk_open");
 
+	cycle_kernel_lock();
 	nonseekable_open(inode, file);
 	switch (iminor(inode)) {
 	case DTLK_MINOR:

drivers/char/efirtc.c

···
  */
 
 
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/miscdevice.h>
···
 	 * We do accept multiple open files at the same time as we
 	 * synchronize on the per call operation.
 	 */
+	cycle_kernel_lock();
 	return 0;
 }
 

drivers/char/genrtc.c

···
 #include <linux/init.h>
 #include <linux/poll.h>
 #include <linux/proc_fs.h>
+#include <linux/smp_lock.h>
 #include <linux/workqueue.h>
 
 #include <asm/uaccess.h>
···
 
 static int gen_rtc_open(struct inode *inode, struct file *file)
 {
-	if (gen_rtc_status & RTC_IS_OPEN)
+	lock_kernel();
+	if (gen_rtc_status & RTC_IS_OPEN) {
+		unlock_kernel();
 		return -EBUSY;
+	}
 
 	gen_rtc_status |= RTC_IS_OPEN;
 	gen_rtc_irq_data = 0;
 	irq_active = 0;
+	unlock_kernel();
 
 	return 0;
 }

drivers/char/hpet.c

···
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/miscdevice.h>
 #include <linux/major.h>
···
 	if (file->f_mode & FMODE_WRITE)
 		return -EINVAL;
 
+	lock_kernel();
 	spin_lock_irq(&hpet_lock);
 
 	for (devp = NULL, hpetp = hpets; hpetp && !devp; hpetp = hpetp->hp_next)
···
 
 	if (!devp) {
 		spin_unlock_irq(&hpet_lock);
+		unlock_kernel();
 		return -EBUSY;
 	}
 
···
 	devp->hd_irqdata = 0;
 	devp->hd_flags |= HPET_OPEN;
 	spin_unlock_irq(&hpet_lock);
+	unlock_kernel();
 
 	return 0;
 }

drivers/char/hw_random/core.c

···
 #include <linux/kernel.h>
 #include <linux/fs.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include <linux/init.h>
 #include <linux/miscdevice.h>
 #include <linux/delay.h>
···
 		return -EINVAL;
 	if (filp->f_mode & FMODE_WRITE)
 		return -EINVAL;
+	cycle_kernel_lock();
 	return 0;
 }
 

drivers/char/ip2/ip2main.c

···
 #include <linux/major.h>
 #include <linux/wait.h>
 #include <linux/device.h>
+#include <linux/smp_lock.h>
 
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
···
 static int
 ip2_ipl_open( struct inode *pInode, struct file *pFile )
 {
-	unsigned int iplminor = iminor(pInode);
-	i2eBordStrPtr pB;
-	i2ChanStrPtr  pCh;
 
 #ifdef IP2DEBUG_IPL
 	printk (KERN_DEBUG "IP2IPL: open\n" );
 #endif
-
-	switch(iplminor) {
-	// These are the IPL devices
-	case 0:
-	case 4:
-	case 8:
-	case 12:
-		break;
-
-	// These are the status devices
-	case 1:
-	case 5:
-	case 9:
-	case 13:
-		break;
-
-	// These are the debug devices
-	case 2:
-	case 6:
-	case 10:
-	case 14:
-		pB = i2BoardPtrTable[iplminor / 4];
-		pCh = (i2ChanStrPtr) pB->i2eChannelPtr;
-		break;
-
-	// This is the trace device
-	case 3:
-		break;
-	}
+	cycle_kernel_lock();
 	return 0;
 }
 

drivers/char/ip27-rtc.c

···
 #include <linux/bcd.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/miscdevice.h>
 #include <linux/ioport.h>
···
 
 static int rtc_open(struct inode *inode, struct file *file)
 {
+	lock_kernel();
 	spin_lock_irq(&rtc_lock);
 
 	if (rtc_status & RTC_IS_OPEN) {
 		spin_unlock_irq(&rtc_lock);
+		unlock_kernel();
 		return -EBUSY;
 	}
 
 	rtc_status |= RTC_IS_OPEN;
 	spin_unlock_irq(&rtc_lock);
+	unlock_kernel();
 
 	return 0;
 }

drivers/char/ipmi/ipmi_devintf.c

···
 #include <linux/init.h>
 #include <linux/device.h>
 #include <linux/compat.h>
+#include <linux/smp_lock.h>
 
 struct ipmi_file_private
 {
···
 	struct ipmi_file_private *priv = file->private_data;
 	int                      result;
 
+	lock_kernel(); /* could race against open() otherwise */
 	result = fasync_helper(fd, file, on, &priv->fasync_queue);
+	unlock_kernel();
 
 	return (result);
 }
···
 	if (!priv)
 		return -ENOMEM;
 
+	lock_kernel();
 	priv->file = file;
 
 	rv = ipmi_create_user(if_num,
···
 			      &(priv->user));
 	if (rv) {
 		kfree(priv);
-		return rv;
+		goto out;
 	}
 
 	file->private_data = priv;
···
 	priv->default_retries = -1;
 	priv->default_retry_time_ms = 0;
 
-	return 0;
+out:
+	unlock_kernel();
+	return rv;
 }
 
 static int ipmi_release(struct inode *inode, struct file *file)

drivers/char/ipmi/ipmi_watchdog.c

···
 #include <linux/moduleparam.h>
 #include <linux/ipmi.h>
 #include <linux/ipmi_smi.h>
+#include <linux/smp_lock.h>
 #include <linux/watchdog.h>
 #include <linux/miscdevice.h>
 #include <linux/init.h>
···
 	case WATCHDOG_MINOR:
 		if (test_and_set_bit(0, &ipmi_wdog_open))
 			return -EBUSY;
+
+		cycle_kernel_lock();
 
 		/*
 		 * Don't start the timer now, let it start on the

drivers/char/lcd.c

···
 #include <linux/mc146818rtc.h>
 #include <linux/netdevice.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include <linux/delay.h>
 
 #include <asm/io.h>
···
 
 static int lcd_open(struct inode *inode, struct file *file)
 {
+	cycle_kernel_lock();
+
 	if (!lcd_present)
 		return -ENXIO;
 	else

drivers/char/lp.c

···
 #include <linux/device.h>
 #include <linux/wait.h>
 #include <linux/jiffies.h>
+#include <linux/smp_lock.h>
 
 #include <linux/parport.h>
 #undef LP_STATS
···
 static int lp_open(struct inode * inode, struct file * file)
 {
 	unsigned int minor = iminor(inode);
+	int ret = 0;
 
-	if (minor >= LP_NO)
-		return -ENXIO;
-	if ((LP_F(minor) & LP_EXIST) == 0)
-		return -ENXIO;
-	if (test_and_set_bit(LP_BUSY_BIT_POS, &LP_F(minor)))
-		return -EBUSY;
-
+	lock_kernel();
+	if (minor >= LP_NO) {
+		ret = -ENXIO;
+		goto out;
+	}
+	if ((LP_F(minor) & LP_EXIST) == 0) {
+		ret = -ENXIO;
+		goto out;
+	}
+	if (test_and_set_bit(LP_BUSY_BIT_POS, &LP_F(minor))) {
+		ret = -EBUSY;
+		goto out;
+	}
 	/* If ABORTOPEN is set and the printer is offline or out of paper,
 	   we may still want to open it to perform ioctl()s.  Therefore we
 	   have commandeered O_NONBLOCK, even though it is being used in
···
 		if (status & LP_POUTPA) {
 			printk(KERN_INFO "lp%d out of paper\n", minor);
 			LP_F(minor) &= ~LP_BUSY;
-			return -ENOSPC;
+			ret = -ENOSPC;
+			goto out;
 		} else if (!(status & LP_PSELECD)) {
 			printk(KERN_INFO "lp%d off-line\n", minor);
 			LP_F(minor) &= ~LP_BUSY;
-			return -EIO;
+			ret = -EIO;
+			goto out;
 		} else if (!(status & LP_PERRORP)) {
 			printk(KERN_ERR "lp%d printer error\n", minor);
 			LP_F(minor) &= ~LP_BUSY;
-			return -EIO;
+			ret = -EIO;
+			goto out;
 		}
 	}
 	lp_table[minor].lp_buffer = kmalloc(LP_BUFFER_SIZE, GFP_KERNEL);
 	if (!lp_table[minor].lp_buffer) {
 		LP_F(minor) &= ~LP_BUSY;
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto out;
 	}
 	/* Determine if the peripheral supports ECP mode */
 	lp_claim_parport_or_block (&lp_table[minor]);
···
 	parport_negotiate (lp_table[minor].dev->port, IEEE1284_MODE_COMPAT);
 	lp_release_parport (&lp_table[minor]);
 	lp_table[minor].current_mode = IEEE1284_MODE_COMPAT;
-	return 0;
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int lp_release(struct inode * inode, struct file * file)

drivers/char/mbcs.c

···
 #include <linux/mm.h>
 #include <linux/uio.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 #include <asm/io.h>
 #include <asm/uaccess.h>
 #include <asm/system.h>
···
 	struct mbcs_soft *soft;
 	int minor;
 
+	lock_kernel();
 	minor = iminor(ip);
 
+	/* Nothing protects access to this list... */
 	list_for_each_entry(soft, &soft_list, list) {
 		if (soft->nasid == minor) {
 			fp->private_data = soft->cxdev;
+			unlock_kernel();
 			return 0;
 		}
 	}
 
+	unlock_kernel();
 	return -ENODEV;
 }
 

drivers/char/mem.c

···
 #include <linux/bootmem.h>
 #include <linux/splice.h>
 #include <linux/pfn.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 #include <asm/io.h>
···
 
 static int memory_open(struct inode * inode, struct file * filp)
 {
+	int ret = 0;
+
+	lock_kernel();
 	switch (iminor(inode)) {
 		case 1:
 			filp->f_op = &mem_fops;
···
 			break;
 #endif
 		default:
+			unlock_kernel();
 			return -ENXIO;
 	}
 	if (filp->f_op && filp->f_op->open)
-		return filp->f_op->open(inode,filp);
-	return 0;
+		ret = filp->f_op->open(inode,filp);
+	unlock_kernel();
+	return ret;
 }
 
 static const struct file_operations memory_fops = {

drivers/char/misc.c

···
 #include <linux/device.h>
 #include <linux/tty.h>
 #include <linux/kmod.h>
+#include <linux/smp_lock.h>
 
 /*
  * Head entry for the doubly linked miscdevice list
···
 	int err = -ENODEV;
 	const struct file_operations *old_fops, *new_fops = NULL;
 	
+	lock_kernel();
 	mutex_lock(&misc_mtx);
 	
 	list_for_each_entry(c, &misc_list, list) {
···
 	fops_put(old_fops);
 fail:
 	mutex_unlock(&misc_mtx);
+	unlock_kernel();
 	return err;
 }
 

drivers/char/mwave/mwavedd.c

···
 #include <linux/serial.h>
 #include <linux/sched.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 #include <linux/delay.h>
 #include <linux/serial_8250.h>
 #include "smapi.h"
···
 	PRINTK_2(TRACE_MWAVE,
 		"mwavedd::mwave_open, exit return retval %x\n", retval);
 
+	cycle_kernel_lock();
 	return retval;
 }
 

drivers/char/nvram.c

···
 #include <linux/init.h>
 #include <linux/proc_fs.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 
 #include <asm/io.h>
 #include <asm/uaccess.h>
···
 static int
 nvram_open(struct inode *inode, struct file *file)
 {
+	lock_kernel();
 	spin_lock(&nvram_state_lock);
 
 	if ((nvram_open_cnt && (file->f_flags & O_EXCL)) ||
 	    (nvram_open_mode & NVRAM_EXCL) ||
 	    ((file->f_mode & 2) && (nvram_open_mode & NVRAM_WRITE))) {
 		spin_unlock(&nvram_state_lock);
+		unlock_kernel();
 		return -EBUSY;
 	}
 
···
 	nvram_open_cnt++;
 
 	spin_unlock(&nvram_state_lock);
+	unlock_kernel();
 
 	return 0;
 }

drivers/char/pc8736x_gpio.c

···
 #include <linux/mutex.h>
 #include <linux/nsc_gpio.h>
 #include <linux/platform_device.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 
 #define DEVNAME "pc8736x_gpio"
···
 	unsigned m = iminor(inode);
 	file->private_data = &pc8736x_gpio_ops;
 
+	cycle_kernel_lock();
 	dev_dbg(&pdev->dev, "open %d\n", m);
 
 	if (m >= PC8736X_GPIO_CT)

drivers/char/ppdev.c

···
 #include <linux/poll.h>
 #include <linux/major.h>
 #include <linux/ppdev.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 
 #define PP_VERSION "ppdev: user-space parallel port driver"
···
 	unsigned int minor = iminor(inode);
 	struct pp_struct *pp;
 
+	cycle_kernel_lock();
 	if (minor >= PARPORT_MAX)
 		return -ENXIO;
 

drivers/char/raw.c

···
 #include <linux/cdev.h>
 #include <linux/device.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 
···
 		return 0;
 	}
 
+	lock_kernel();
 	mutex_lock(&raw_mutex);
 
 	/*
···
 			bdev->bd_inode->i_mapping;
 	filp->private_data = bdev;
 	mutex_unlock(&raw_mutex);
+	unlock_kernel();
 	return 0;
 
 out2:

drivers/char/rtc.c

···
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 #include <linux/sysctl.h>
 #include <linux/wait.h>
 #include <linux/bcd.h>
···
  * needed here. Or anywhere else in this driver. */
 static int rtc_open(struct inode *inode, struct file *file)
 {
+	lock_kernel();
 	spin_lock_irq(&rtc_lock);
 
 	if (rtc_status & RTC_IS_OPEN)
···
 
 	rtc_irq_data = 0;
 	spin_unlock_irq(&rtc_lock);
+	unlock_kernel();
 	return 0;
 
 out_busy:
 	spin_unlock_irq(&rtc_lock);
+	unlock_kernel();
 	return -EBUSY;
 }
 

drivers/char/scx200_gpio.c

···
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 
···
 	unsigned m = iminor(inode);
 	file->private_data = &scx200_gpio_ops;
 
+	cycle_kernel_lock();
 	if (m >= MAX_PINS)
 		return -EINVAL;
 	return nonseekable_open(inode, file);

drivers/char/snsc.c

···
 #include <linux/poll.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <asm/sn/io.h>
 #include <asm/sn/sn_sal.h>
 #include <asm/sn/module.h>
···
 	file->private_data = sd;
 
 	/* hook this subchannel up to the system controller interrupt */
+	lock_kernel();
 	rv = request_irq(SGI_UART_VECTOR, scdrv_interrupt,
 			 IRQF_SHARED | IRQF_DISABLED,
 			 SYSCTL_BASENAME, sd);
···
 		ia64_sn_irtr_close(sd->sd_nasid, sd->sd_subch);
 		kfree(sd);
 		printk("%s: irq request failed (%d)\n", __func__, rv);
+		unlock_kernel();
 		return -EBUSY;
 	}
-
+	unlock_kernel();
 	return 0;
 }
 

drivers/char/sonypi.c

···
 #include <linux/err.h>
 #include <linux/kfifo.h>
 #include <linux/platform_device.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 #include <asm/io.h>
···
 
 static int sonypi_misc_open(struct inode *inode, struct file *file)
 {
+	lock_kernel();
 	mutex_lock(&sonypi_device.lock);
 	/* Flush input queue on first open */
 	if (!sonypi_device.open_count)
 		kfifo_reset(sonypi_device.fifo);
 	sonypi_device.open_count++;
 	mutex_unlock(&sonypi_device.lock);
+	unlock_kernel();
 	return 0;
 }
 

drivers/char/tb0219.c

···
 #include <linux/fs.h>
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/smp_lock.h>
 
 #include <asm/io.h>
 #include <asm/reboot.h>
···
 {
 	unsigned int minor;
 
+	cycle_kernel_lock();
 	minor = iminor(inode);
 	switch (minor) {
 	case 0:

drivers/char/tlclk.c

···
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 #include <linux/timer.h>
 #include <linux/sysfs.h>
 #include <linux/device.h>
···
 {
 	int result;
 
-	if (test_and_set_bit(0, &useflags))
-		return -EBUSY;
+	lock_kernel();
+	if (test_and_set_bit(0, &useflags)) {
+		result = -EBUSY;
 		/* this legacy device is always one per system and it doesn't
 		 * know how to handle multiple concurrent clients.
 		 */
+		goto out;
+	}
 
 	/* Make sure there is no interrupt pending while
 	 * initialising interrupt handler */
···
 	 * we can't share this IRQ */
 	result = request_irq(telclk_interrupt, &tlclk_interrupt,
 			     IRQF_DISABLED, "telco_clock", tlclk_interrupt);
-	if (result == -EBUSY) {
+	if (result == -EBUSY)
 		printk(KERN_ERR "tlclk: Interrupt can't be reserved.\n");
-		return -EBUSY;
-	}
-	inb(TLCLK_REG6);	/* Clear interrupt events */
+	else
+		inb(TLCLK_REG6);	/* Clear interrupt events */
 
-	return 0;
+out:
+	unlock_kernel();
+	return result;
 }
 
 static int tlclk_release(struct inode *inode, struct file *filp)

drivers/char/tpm/tpm.c

···
 #include <linux/poll.h>
 #include <linux/mutex.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 
 #include "tpm.h"
 
···
 	int rc = 0, minor = iminor(inode);
 	struct tpm_chip *chip = NULL, *pos;
 
+	lock_kernel();
 	spin_lock(&driver_lock);
 
 	list_for_each_entry(pos, &tpm_chip_list, list) {
···
 	if (chip->data_buffer == NULL) {
 		chip->num_opens--;
 		put_device(chip->dev);
+		unlock_kernel();
 		return -ENOMEM;
 	}
 
 	atomic_set(&chip->data_pending, 0);
 
 	file->private_data = chip;
+	unlock_kernel();
 	return 0;
 
 err_out:
 	spin_unlock(&driver_lock);
+	unlock_kernel();
 	return rc;
 }
 EXPORT_SYMBOL_GPL(tpm_open);

drivers/char/tty_io.c

···
  *		 ->siglock protects ->signal/->sighand
  */
 
-static int tty_open(struct inode *inode, struct file *filp)
+static int __tty_open(struct inode *inode, struct file *filp)
 {
 	struct tty_struct *tty;
 	int noctty, retval;
···
 	return 0;
 }
 
+/* BKL pushdown: scary code avoidance wrapper */
+static int tty_open(struct inode *inode, struct file *filp)
+{
+	int ret;
+
+	lock_kernel();
+	ret = __tty_open(inode, filp);
+	unlock_kernel();
+	return ret;
+}
+
+
+
 #ifdef CONFIG_UNIX98_PTYS
 /**
  *	ptmx_open		-	open a unix 98 pty master
···
  *		allocated_ptys_lock handles the list of free pty numbers
  */
 
-static int ptmx_open(struct inode *inode, struct file *filp)
+static int __ptmx_open(struct inode *inode, struct file *filp)
 {
 	struct tty_struct *tty;
 	int retval;
···
 out:
 	devpts_kill_index(index);
 	return retval;
+}
+
+static int ptmx_open(struct inode *inode, struct file *filp)
+{
+	int ret;
+
+	lock_kernel();
+	ret = __ptmx_open(inode, filp);
+	unlock_kernel();
+	return ret;
 }
 #endif
 
···
 {
 	struct tty_struct *tty;
 	unsigned long flags;
-	int retval;
+	int retval = 0;
 
+	lock_kernel();
 	tty = (struct tty_struct *)filp->private_data;
 	if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "tty_fasync"))
-		return 0;
+		goto out;
 
 	retval = fasync_helper(fd, filp, on, &tty->fasync);
 	if (retval <= 0)
-		return retval;
+		goto out;
 
 	if (on) {
 		enum pid_type type;
···
 		spin_unlock_irqrestore(&tty->ctrl_lock, flags);
 		retval = __f_setown(filp, pid, type, 0);
 		if (retval)
-			return retval;
+			goto out;
 	} else {
 		if (!tty->fasync && !waitqueue_active(&tty->read_wait))
 			tty->minimum_to_wake = N_TTY_BUF_SIZE;
 	}
-	return 0;
+	retval = 0;
+out:
+	unlock_kernel();
+	return retval;
 }
 
 /**

drivers/char/vc_screen.c

···
 #include <linux/kbd_kern.h>
 #include <linux/console.h>
 #include <linux/device.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 #include <asm/byteorder.h>
···
 vcs_open(struct inode *inode, struct file *filp)
 {
 	unsigned int currcons = iminor(inode) & 127;
+	int ret = 0;
+	
+	lock_kernel();
 	if(currcons && !vc_cons_allocated(currcons-1))
-		return -ENXIO;
-	return 0;
+		ret = -ENXIO;
+	unlock_kernel();
+	return ret;
 }
 
 static const struct file_operations vcs_fops = {

drivers/char/viotape.c

···
 #include <linux/completion.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 #include <asm/ioctls.h>
···
 	if (op == NULL)
 		return -ENOMEM;
 
+	lock_kernel();
 	get_dev_info(file->f_path.dentry->d_inode, &devi);
 
 	/* Note: We currently only support one mode! */
···
 
 free_op:
 	free_op_struct(op);
+	unlock_kernel();
 	return ret;
 }
 

drivers/char/vr41xx_giu.c

···
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/types.h>
 
···
 {
 	unsigned int pin;
 
+	cycle_kernel_lock();
 	pin = iminor(inode);
 	if (pin >= giu_nr_pins)
 		return -EBADF;

drivers/char/xilinx_hwicap/xilinx_hwicap.c

···
 #include <linux/poll.h>
 #include <linux/proc_fs.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 #include <linux/sysctl.h>
 #include <linux/version.h>
 #include <linux/fs.h>
···
 	struct hwicap_drvdata *drvdata;
 	int status;
 
+	lock_kernel();
 	drvdata = container_of(inode->i_cdev, struct hwicap_drvdata, cdev);
 
 	status = mutex_lock_interruptible(&drvdata->sem);
 	if (status)
-		return status;
+		goto out;
 
 	if (drvdata->is_open) {
 		status = -EBUSY;
···
 
  error:
 	mutex_unlock(&drvdata->sem);
+ out:
+	unlock_kernel();
 	return status;
 }
 

drivers/gpu/drm/drm_fops.c

···
 #include "drmP.h"
 #include "drm_sarea.h"
 #include <linux/poll.h>
+#include <linux/smp_lock.h>
 
 static int drm_open_helper(struct inode *inode, struct file *filp,
 			   struct drm_device * dev);
···
 
 	DRM_DEBUG("\n");
 
+	/* BKL pushdown: note that nothing else serializes idr_find() */
+	lock_kernel();
 	minor = idr_find(&drm_minors_idr, minor_id);
 	if (!minor)
-		return -ENODEV;
+		goto out;
 
 	if (!(dev = minor->dev))
-		return -ENODEV;
+		goto out;
 
 	old_fops = filp->f_op;
 	filp->f_op = fops_get(&dev->driver->fops);
···
 	}
 	fops_put(old_fops);
 
+out:
+	unlock_kernel();
 	return err;
 }
 

drivers/hid/hidraw.c

···
 #include <linux/major.h>
 #include <linux/hid.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 
 #include <linux/hidraw.h>
 
···
 	struct hidraw_list *list;
 	int err = 0;
 
+	lock_kernel();
 	if (!(list = kzalloc(sizeof(struct hidraw_list), GFP_KERNEL))) {
 		err = -ENOMEM;
 		goto out;
···
 out_unlock:
 	spin_unlock(&minors_lock);
 out:
+	unlock_kernel();
 	return err;
 
 }

drivers/i2c/i2c-dev.c

···
 #include <linux/list.h>
 #include <linux/i2c.h>
 #include <linux/i2c-dev.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 
 static struct i2c_driver i2cdev_driver;
···
 	struct i2c_client *client;
 	struct i2c_adapter *adap;
 	struct i2c_dev *i2c_dev;
+	int ret = 0;
 
+	lock_kernel();
 	i2c_dev = i2c_dev_get_by_minor(minor);
-	if (!i2c_dev)
-		return -ENODEV;
+	if (!i2c_dev) {
+		ret = -ENODEV;
+		goto out;
+	}
 
 	adap = i2c_get_adapter(i2c_dev->adap->nr);
-	if (!adap)
-		return -ENODEV;
+	if (!adap) {
+		ret = -ENODEV;
+		goto out;
+	}
 
 	/* This creates an anonymous i2c_client, which may later be
 	 * pointed to some address using I2C_SLAVE or I2C_SLAVE_FORCE.
···
 	client = kzalloc(sizeof(*client), GFP_KERNEL);
 	if (!client) {
 		i2c_put_adapter(adap);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto out;
 	}
 	snprintf(client->name, I2C_NAME_SIZE, "i2c-dev %d", adap->nr);
 	client->driver = &i2cdev_driver;
···
 	client->adapter = adap;
 	file->private_data = client;
 
-	return 0;
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int i2cdev_release(struct inode *inode, struct file *file)

drivers/ide/ide-tape.c

···
 	if (i >= MAX_HWIFS * MAX_DRIVES)
 		return -ENXIO;
 
+	lock_kernel();
 	tape = ide_tape_chrdev_get(i);
-	if (!tape)
+	if (!tape) {
+		unlock_kernel();
 		return -ENXIO;
+	}
 
 	debug_log(DBG_CHRDEV, "Enter %s\n", __func__);
 
···
 			}
 		}
 	}
+	unlock_kernel();
 	return 0;
 
 out_put_tape:
 	ide_tape_put(tape);
+	unlock_kernel();
 	return retval;
 }
 

drivers/infiniband/core/ucm.c

···
 #include <linux/cdev.h>
 #include <linux/idr.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 
···
 {
 	struct ib_ucm_file *file;
 
+	cycle_kernel_lock();
 	file = kmalloc(sizeof(*file), GFP_KERNEL);
 	if (!file)
 		return -ENOMEM;

drivers/infiniband/core/ucma.c

···
 #include <linux/in.h>
 #include <linux/in6.h>
 #include <linux/miscdevice.h>
+#include <linux/smp_lock.h>
 
 #include <rdma/rdma_user_cm.h>
 #include <rdma/ib_marshall.h>
···
 	if (!file)
 		return -ENOMEM;
 
+	lock_kernel();
 	INIT_LIST_HEAD(&file->event_list);
 	INIT_LIST_HEAD(&file->ctx_list);
 	init_waitqueue_head(&file->poll_wait);
···
 
 	filp->private_data = file;
 	file->filp = filp;
+	unlock_kernel();
 	return 0;
 }
 

drivers/infiniband/core/user_mad.c

···
 }
 #endif
 
+/*
+ * ib_umad_open() does not need the BKL:
+ *
+ *  - umad_port[] accesses are protected by port_lock, the
+ *    ib_umad_port structures are properly reference counted, and
+ *    everything else is purely local to the file being created, so
+ *    races against other open calls are not a problem;
+ *  - the ioctl method does not affect any global state outside of the
+ *    file structure being operated on;
+ *  - the port is added to umad_port[] as the last part of module
+ *    initialization so the open method will either immediately run
+ *    -ENXIO, or all required initialization will be done.
+ */
 static int ib_umad_open(struct inode *inode, struct file *filp)
 {
 	struct ib_umad_port *port;

drivers/infiniband/core/uverbs_main.c

···
 		return file->device->ib_dev->mmap(file->ucontext, vma);
 }
 
+/*
+ * ib_uverbs_open() does not need the BKL:
+ *
+ *  - dev_table[] accesses are protected by map_lock, the
+ *    ib_uverbs_device structures are properly reference counted, and
+ *    everything else is purely local to the file being created, so
+ *    races against other open calls are not a problem;
+ *  - there is no ioctl method to race against;
+ *  - the device is added to dev_table[] as the last part of module
+ *    initialization, the open method will either immediately run
+ *    -ENXIO, or all required initialization will be done.
+ */
 static int ib_uverbs_open(struct inode *inode, struct file *filp)
 {
 	struct ib_uverbs_device *dev;
···
 
 err:
 	kref_put(&dev->ref, ib_uverbs_release_dev);
-
 	return ret;
 }
 

drivers/infiniband/hw/ipath/ipath_file_ops.c

···
 #include <linux/highmem.h>
 #include <linux/io.h>
 #include <linux/jiffies.h>
+#include <linux/smp_lock.h>
 #include <asm/pgtable.h>
 
 #include "ipath_kernel.h"
···
 static int ipath_open(struct inode *in, struct file *fp)
 {
 	/* The real work is performed later in ipath_assign_port() */
+	cycle_kernel_lock();
 	fp->private_data = kzalloc(sizeof(struct ipath_filedata), GFP_KERNEL);
 	return fp->private_data ? 0 : -ENOMEM;
 }

drivers/input/input.c

···
 #include <linux/device.h>
 #include <linux/mutex.h>
 #include <linux/rcupdate.h>
+#include <linux/smp_lock.h>
 
 MODULE_AUTHOR("Vojtech Pavlik <[e-mail]>");
 MODULE_DESCRIPTION("Input core");
···
 
 static int input_open_file(struct inode *inode, struct file *file)
 {
-	struct input_handler *handler = input_table[iminor(inode) >> 5];
+	struct input_handler *handler;
 	const struct file_operations *old_fops, *new_fops = NULL;
 	int err;
 
+	lock_kernel();
 	/* No load-on-demand here? */
-	if (!handler || !(new_fops = fops_get(handler->fops)))
-		return -ENODEV;
+	handler = input_table[iminor(inode) >> 5];
+	if (!handler || !(new_fops = fops_get(handler->fops))) {
+		err = -ENODEV;
+		goto out;
+	}
 
 	/*
 	 * That's _really_ odd. Usually NULL ->open means "nothing special",
···
 	 */
 	if (!new_fops->open) {
 		fops_put(new_fops);
-		return -ENODEV;
+		err = -ENODEV;
+		goto out;
 	}
 	old_fops = file->f_op;
 	file->f_op = new_fops;
···
 		file->f_op = fops_get(old_fops);
 	}
 	fops_put(old_fops);
+out:
+	unlock_kernel();
 	return err;
 }
 

drivers/input/misc/hp_sdc_rtc.c

···
 
 #include <linux/hp_sdc.h>
 #include <linux/errno.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/init.h>
 #include <linux/module.h>
···
 
 static int hp_sdc_rtc_open(struct inode *inode, struct file *file)
 {
+	cycle_kernel_lock();
         return 0;
 }
 

drivers/input/misc/uinput.c

···
 #include <linux/fs.h>
 #include <linux/miscdevice.h>
 #include <linux/uinput.h>
+#include <linux/smp_lock.h>
 
 static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 {
···
 	if (!newdev)
 		return -ENOMEM;
 
+	lock_kernel();
 	mutex_init(&newdev->mutex);
 	spin_lock_init(&newdev->requests_lock);
 	init_waitqueue_head(&newdev->requests_waitq);
···
 	newdev->state = UIST_NEW_DEVICE;
 
 	file->private_data = newdev;
+	unlock_kernel();
 
 	return 0;
 }

drivers/input/mousedev.c

···
 #define MOUSEDEV_MIX		31
 
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/poll.h>
 #include <linux/module.h>
 #include <linux/init.h>
···
 	if (i >= MOUSEDEV_MINORS)
 		return -ENODEV;
 
+	lock_kernel();
 	error = mutex_lock_interruptible(&mousedev_table_mutex);
-	if (error)
+	if (error) {
+		unlock_kernel();
 		return error;
+	}
 	mousedev = mousedev_table[i];
 	if (mousedev)
 		get_device(&mousedev->dev);
 	mutex_unlock(&mousedev_table_mutex);
 
-	if (!mousedev)
+	if (!mousedev) {
+		unlock_kernel();
 		return -ENODEV;
+	}
 
 	client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL);
 	if (!client) {
···
 		goto err_free_client;
 
 	file->private_data = client;
+	unlock_kernel();
 	return 0;
 
  err_free_client:
···
 	kfree(client);
  err_put_mousedev:
 	put_device(&mousedev->dev);
+	unlock_kernel();
 	return error;
 }
 

drivers/input/serio/serio_raw.c

···
  */
 
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/poll.h>
 #include <linux/module.h>
 #include <linux/serio.h>
···
 	struct serio_raw_list *list;
 	int retval = 0;
 
+	lock_kernel();
 	retval = mutex_lock_interruptible(&serio_raw_mutex);
 	if (retval)
-		return retval;
+		goto out_bkl;
 
 	if (!(serio_raw = serio_raw_locate(iminor(inode)))) {
 		retval = -ENODEV;
···
 
 out:
 	mutex_unlock(&serio_raw_mutex);
+out_bkl:
+	unlock_kernel();
 	return retval;
 }
 

drivers/isdn/capi/capi.c

···
 #include <linux/signal.h>
 #include <linux/mutex.h>
 #include <linux/mm.h>
+#include <linux/smp_lock.h>
 #include <linux/timer.h>
 #include <linux/wait.h>
 #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
···
 static int
 capi_open(struct inode *inode, struct file *file)
 {
+	int ret;
+	
+	lock_kernel();
 	if (file->private_data)
-		return -EEXIST;
-
-	if ((file->private_data = capidev_alloc()) == NULL)
-		return -ENOMEM;
-
-	return nonseekable_open(inode, file);
+		ret = -EEXIST;
+	else if ((file->private_data = capidev_alloc()) == NULL)
+		ret = -ENOMEM;
+	else
+		ret = nonseekable_open(inode, file);
+	unlock_kernel();
+	return ret;
 }
 
 static int

drivers/isdn/hardware/eicon/divamnt.c

···
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/poll.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 
 #include "platform.h"
···
 
 static int maint_open(struct inode *ino, struct file *filep)
 {
+	int ret;
+
+	lock_kernel();
 	/* only one open is allowed, so we test
 	   it atomically */
 	if (test_and_set_bit(0, &opened))
-		return (-EBUSY);
-
-	filep->private_data = NULL;
-
-	return nonseekable_open(ino, filep);
+		ret = -EBUSY;
+	else {
+		filep->private_data = NULL;
+		ret = nonseekable_open(ino, filep);
+	}
+	unlock_kernel();
+	return ret;
 }
 
 static int maint_close(struct inode *ino, struct file *filep)

drivers/isdn/hardware/eicon/divasi.c

···
 #include <linux/poll.h>
 #include <linux/proc_fs.h>
 #include <linux/skbuff.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 
 #include "platform.h"
···
 
 static int um_idi_open(struct inode *inode, struct file *file)
 {
+	cycle_kernel_lock();
 	return (0);
 }
 

drivers/isdn/hardware/eicon/divasmain.c

···
 #include <linux/list.h>
 #include <linux/poll.h>
 #include <linux/kmod.h>
+#include <linux/smp_lock.h>
 
 #include "platform.h"
 #undef ID_MASK
···
  */
 static int divas_open(struct inode *inode, struct file *file)
 {
+	cycle_kernel_lock();
 	return (0);
 }
 

drivers/isdn/i4l/isdn_common.c

···
 	int chidx;
 	int retval = -ENODEV;
 
-
+	lock_kernel();
 	if (minor == ISDN_MINOR_STATUS) {
 		infostruct *p;
 
···
 #endif
  out:
 	nonseekable_open(ino, filep);
+	unlock_kernel();
 	return retval;
 }
 

drivers/macintosh/adb.c

···
 static int adb_open(struct inode *inode, struct file *file)
 {
 	struct adbdev_state *state;
+	int ret = 0;
 
-	if (iminor(inode) > 0 || adb_controller == NULL)
-		return -ENXIO;
+	lock_kernel();
+	if (iminor(inode) > 0 || adb_controller == NULL) {
+		ret = -ENXIO;
+		goto out;
+	}
 	state = kmalloc(sizeof(struct adbdev_state), GFP_KERNEL);
-	if (state == 0)
-		return -ENOMEM;
+	if (state == 0) {
+		ret = -ENOMEM;
+		goto out;
+	}
 	file->private_data = state;
 	spin_lock_init(&state->lock);
 	atomic_set(&state->n_pending, 0);
···
 	init_waitqueue_head(&state->wait_queue);
 	state->inuse = 1;
 
-	return 0;
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int adb_release(struct inode *inode, struct file *file)

drivers/macintosh/ans-lcd.c

···
  */
 
 #include <linux/types.h>
+#include <linux/smp_lock.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/miscdevice.h>
···
 static int
 anslcd_open( struct inode * inode, struct file * file )
 {
+	cycle_kernel_lock();
 	return 0;
 }
 

drivers/macintosh/smu.c

···
  *    the userland interface
  */
 
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
···
 	pp->mode = smu_file_commands;
 	init_waitqueue_head(&pp->wait);
 
+	lock_kernel();
 	spin_lock_irqsave(&smu_clist_lock, flags);
 	list_add(&pp->list, &smu_clist);
 	spin_unlock_irqrestore(&smu_clist_lock, flags);
 	file->private_data = pp;
+	unlock_kernel();
 
 	return 0;
 }

drivers/macintosh/via-pmu.c

···
  *
  */
 #include <stdarg.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
···
 	pp->rb_get = pp->rb_put = 0;
 	spin_lock_init(&pp->lock);
 	init_waitqueue_head(&pp->wait);
+	lock_kernel();
 	spin_lock_irqsave(&all_pvt_lock, flags);
 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
 	pp->backlight_locker = 0;
···
 	list_add(&pp->list, &all_pmu_pvt);
 	spin_unlock_irqrestore(&all_pvt_lock, flags);
 	file->private_data = pp;
+	unlock_kernel();
 	return 0;
 }
 

drivers/media/dvb/dvb-core/dvbdev.c

···
 #include <linux/fs.h>
 #include <linux/cdev.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 #include "dvbdev.h"
 
 static int dvbdev_debug;
···
 {
 	struct dvb_device *dvbdev;
 
+	lock_kernel();
 	dvbdev = dvbdev_find_device (iminor(inode));
 
 	if (dvbdev && dvbdev->fops) {
···
 			file->f_op = fops_get(old_fops);
 		}
 		fops_put(old_fops);
+		unlock_kernel();
 		return err;
 	}
+	unlock_kernel();
 	return -ENODEV;
 }
 

drivers/media/radio/miropcm20-rds.c

···
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/fs.h>
 #include <linux/miscdevice.h>
 #include <linux/delay.h>
···
 	if (rds_users)
 		return -EBUSY;
 
+	lock_kernel();
 	rds_users++;
 	if ((text_buffer=kmalloc(66, GFP_KERNEL)) == 0) {
 		rds_users--;
 		printk(KERN_NOTICE "aci-rds: Out of memory by open()...\n");
+		unlock_kernel();
 		return -ENOMEM;
 	}
 
+	unlock_kernel();
 	return 0;
 }
 

drivers/media/video/videodev.c

···
 #include <linux/init.h>
 #include <linux/kmod.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <asm/system.h>
 
···
 
 	if(minor>=VIDEO_NUM_DEVICES)
 		return -ENODEV;
+	lock_kernel();
 	mutex_lock(&videodev_lock);
 	vfl=video_device[minor];
 	if(vfl==NULL) {
···
 		vfl=video_device[minor];
 		if (vfl==NULL) {
 			mutex_unlock(&videodev_lock);
+			unlock_kernel();
 			return -ENODEV;
 		}
 	}
···
 	}
 	fops_put(old_fops);
 	mutex_unlock(&videodev_lock);
+	unlock_kernel();
 	return err;
 }
 

drivers/message/fusion/mptctl.c

···
 mptctl_fasync(int fd, struct file *filep, int mode)
 {
 	MPT_ADAPTER	*ioc;
+	int ret;
 
+	lock_kernel();
 	list_for_each_entry(ioc, &ioc_list, list)
 		ioc->aen_event_read_flag=0;
 
-	return fasync_helper(fd, filep, mode, &async_queue);
+	ret = fasync_helper(fd, filep, mode, &async_queue);
+	unlock_kernel();
+	return ret;
 }
 
 static int

drivers/message/i2o/i2o_config.c

···
 	if (!tmp)
 		return -ENOMEM;
 
+	lock_kernel();
 	file->private_data = (void *)(i2o_cfg_info_id++);
 	tmp->fp = file;
 	tmp->fasync = NULL;
···
 	spin_lock_irqsave(&i2o_config_lock, flags);
 	open_files = tmp;
 	spin_unlock_irqrestore(&i2o_config_lock, flags);
+	unlock_kernel();
 
 	return 0;
 }
···
 {
 	ulong id = (ulong) fp->private_data;
 	struct i2o_cfg_info *p;
+	int ret = -EBADF;
 
+	lock_kernel();
 	for (p = open_files; p; p = p->next)
 		if (p->q_id == id)
 			break;
 
-	if (!p)
-		return -EBADF;
-
-	return fasync_helper(fd, fp, on, &p->fasync);
+	if (p)
+		ret = fasync_helper(fd, fp, on, &p->fasync);
+	unlock_kernel();
+	return ret;
 }
 
 static int cfg_release(struct inode *inode, struct file *file)

drivers/misc/hdpuftrs/hdpu_cpustate.c

···
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 #include <linux/miscdevice.h>
 #include <linux/proc_fs.h>
 #include <linux/hdpu_features.h>
···
 
 static int cpustate_open(struct inode *inode, struct file *file)
 {
-	return cpustate_get_ref((file->f_flags & O_EXCL));
+	int ret;
+
+	lock_kernel();
+	ret = cpustate_get_ref((file->f_flags & O_EXCL));
+	unlock_kernel();
+
+	return ret;
 }
 
 static int cpustate_release(struct inode *inode, struct file *file)

drivers/misc/phantom.c

···
 #include <linux/interrupt.h>
 #include <linux/cdev.h>
 #include <linux/phantom.h>
+#include <linux/smp_lock.h>
 
 #include <asm/atomic.h>
 #include <asm/io.h>
···
 	struct phantom_device *dev = container_of(inode->i_cdev,
 			struct phantom_device, cdev);
 
+	lock_kernel();
 	nonseekable_open(inode, file);
 
-	if (mutex_lock_interruptible(&dev->open_lock))
+	if (mutex_lock_interruptible(&dev->open_lock)) {
+		unlock_kernel();
 		return -ERESTARTSYS;
+	}
 
 	if (dev->opened) {
 		mutex_unlock(&dev->open_lock);
+		unlock_kernel();
 		return -EINVAL;
 	}
 
···
 	atomic_set(&dev->counter, 0);
 	dev->opened++;
 	mutex_unlock(&dev->open_lock);
-
+	unlock_kernel();
 	return 0;
 }
 

drivers/misc/sony-laptop.c

···
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/backlight.h>
 #include <linux/platform_device.h>
···
 static int sonypi_misc_open(struct inode *inode, struct file *file)
 {
 	/* Flush input queue on first open */
+	lock_kernel();
 	if (atomic_inc_return(&sonypi_compat.open_count) == 1)
 		kfifo_reset(sonypi_compat.fifo);
+	unlock_kernel();
 	return 0;
 }
 

drivers/mtd/mtdchar.c

···
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/compatmac.h>
···
 {
 	int minor = iminor(inode);
 	int devnum = minor >> 1;
+	int ret = 0;
 	struct mtd_info *mtd;
 	struct mtd_file_info *mfi;
 
···
 	if ((file->f_mode & 2) && (minor & 1))
 		return -EACCES;
 
+	lock_kernel();
 	mtd = get_mtd_device(NULL, devnum);
 
-	if (IS_ERR(mtd))
-		return PTR_ERR(mtd);
+	if (IS_ERR(mtd)) {
+		ret = PTR_ERR(mtd);
+		goto out;
+	}
 
 	if (MTD_ABSENT == mtd->type) {
 		put_mtd_device(mtd);
-		return -ENODEV;
+		ret = -ENODEV;
+		goto out;
 	}
 
 	/* You can't open it RW if it's not a writeable device */
 	if ((file->f_mode & 2) && !(mtd->flags & MTD_WRITEABLE)) {
 		put_mtd_device(mtd);
-		return -EACCES;
+		ret = -EACCES;
+		goto out;
 	}
 
 	mfi = kzalloc(sizeof(*mfi), GFP_KERNEL);
 	if (!mfi) {
 		put_mtd_device(mtd);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto out;
 	}
 	mfi->mtd = mtd;
 	file->private_data = mfi;
 
-	return 0;
+out:
+	unlock_kernel();
+	return ret;
 } /* mtd_open */
 
 /*====================================================================*/

drivers/mtd/ubi/cdev.c

···
 #include <linux/stat.h>
 #include <linux/ioctl.h>
 #include <linux/capability.h>
+#include <linux/smp_lock.h>
 #include <mtd/ubi-user.h>
 #include <asm/uaccess.h>
 #include <asm/div64.h>
···
 	struct ubi_volume_desc *desc;
 	int vol_id = iminor(inode) - 1, mode, ubi_num;
 
+	lock_kernel();
 	ubi_num = ubi_major2num(imajor(inode));
-	if (ubi_num < 0)
+	if (ubi_num < 0) {
+		unlock_kernel();
 		return ubi_num;
+	}
 
 	if (file->f_mode & FMODE_WRITE)
 		mode = UBI_READWRITE;
···
 	dbg_msg("open volume %d, mode %d", vol_id, mode);
 
 	desc = ubi_open_volume(ubi_num, vol_id, mode);
+	unlock_kernel();
 	if (IS_ERR(desc))
 		return PTR_ERR(desc);
 

drivers/net/ppp_generic.c

···
 #include <linux/if_arp.h>
 #include <linux/ip.h>
 #include <linux/tcp.h>
+#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/rwsem.h>
 #include <linux/stddef.h>
···
  */
 static int ppp_open(struct inode *inode, struct file *file)
 {
+	cycle_kernel_lock();
 	/*
 	 * This could (should?) be enforced by the permissions on /dev/ppp.
 	 */

drivers/net/tun.c

···
 #include <linux/kernel.h>
 #include <linux/major.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/poll.h>
 #include <linux/fcntl.h>
 #include <linux/init.h>
···
 
 	DBG(KERN_INFO "%s: tun_chr_fasync %d\n", tun->dev->name, on);
 
+	lock_kernel();
 	if ((ret = fasync_helper(fd, file, on, &tun->fasync)) < 0)
-		return ret;
+		goto out;
 
 	if (on) {
 		ret = __f_setown(file, task_pid(current), PIDTYPE_PID, 0);
 		if (ret)
-			return ret;
+			goto out;
 		tun->flags |= TUN_FASYNC;
 	} else
 		tun->flags &= ~TUN_FASYNC;
-
-	return 0;
+	ret = 0;
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int tun_chr_open(struct inode *inode, struct file * file)
 {
+	cycle_kernel_lock();
 	DBG1(KERN_INFO "tunX: tun_chr_open\n");
 	file->private_data = NULL;
 	return 0;

drivers/net/wan/cosa.c

···
 #include <linux/spinlock.h>
 #include <linux/mutex.h>
 #include <linux/device.h>
+#include <linux/smp_lock.h>
 
 #undef COSA_SLOW_IO	/* for testing purposes only */
 
···
 	struct channel_data *chan;
 	unsigned long flags;
 	int n;
+	int ret = 0;
 
+	lock_kernel();
 	if ((n=iminor(file->f_path.dentry->d_inode)>>CARD_MINOR_BITS)
-		>= nr_cards)
-		return -ENODEV;
+		>= nr_cards) {
+		ret = -ENODEV;
+		goto out;
+	}
 	cosa = cosa_cards+n;
 
 	if ((n=iminor(file->f_path.dentry->d_inode)
-		& ((1<<CARD_MINOR_BITS)-1)) >= cosa->nchannels)
-		return -ENODEV;
+		& ((1<<CARD_MINOR_BITS)-1)) >= cosa->nchannels) {
+		ret = -ENODEV;
+		goto out;
+	}
 	chan = cosa->chan + n;
 	
 	file->private_data = chan;
···
 
 	if (chan->usage < 0) { /* in netdev mode */
 		spin_unlock_irqrestore(&cosa->lock, flags);
-		return -EBUSY;
+		ret = -EBUSY;
+		goto out;
 	}
 	cosa->usage++;
 	chan->usage++;
···
 	chan->setup_rx = chrdev_setup_rx;
 	chan->rx_done = chrdev_rx_done;
 	spin_unlock_irqrestore(&cosa->lock, flags);
-	return 0;
+out:
+	unlock_kernel();
+	return ret;
 }
 
 static int cosa_release(struct inode *inode, struct file *file)

drivers/parisc/eisa_eeprom.c

···
 #include <linux/kernel.h>
 #include <linux/miscdevice.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/fs.h>
 #include <asm/io.h>
 #include <asm/uaccess.h>
···
 
 static int eisa_eeprom_open(struct inode *inode, struct file *file)
 {
+	cycle_kernel_lock();
+
 	if (file->f_mode & 2)
 		return -EINVAL;
    

drivers/pcmcia/pcmcia_ioctl.c

···
 #include <linux/proc_fs.h>
 #include <linux/poll.h>
 #include <linux/pci.h>
+#include <linux/smp_lock.h>
 #include <linux/workqueue.h>
 
 #include <pcmcia/cs_types.h>
···
     struct pcmcia_socket *s;
     user_info_t *user;
     static int warning_printed = 0;
+    int ret = 0;
 
     ds_dbg(0, "ds_open(socket %d)\n", i);
 
+    lock_kernel();
     s = pcmcia_get_socket_by_nr(i);
-    if (!s)
-	    return -ENODEV;
+    if (!s) {
+	    ret = -ENODEV;
+	    goto out;
+    }
     s = pcmcia_get_socket(s);
-    if (!s)
-	    return -ENODEV;
+    if (!s) {
+	    ret = -ENODEV;
+	    goto out;
+    }
 
     if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
 	    if (s->pcmcia_state.busy) {
 		    pcmcia_put_socket(s);
-		    return -EBUSY;
+		    ret = -EBUSY;
+		    goto out;
 	    }
 	else
 	    s->pcmcia_state.busy = 1;
···
     user = kmalloc(sizeof(user_info_t), GFP_KERNEL);
     if (!user) {
 	    pcmcia_put_socket(s);
-	    return -ENOMEM;
+	    ret = -ENOMEM;
+	    goto out;
     }
     user->event_tail = user->event_head = 0;
     user->next = s->user;
···
 
     if (s->pcmcia_state.present)
 	queue_event(user, CS_EVENT_CARD_INSERTION);
-    return 0;
+out:
+    unlock_kernel();
+    return ret;
 } /* ds_open */
 
 /*====================================================================*/

drivers/rtc/rtc-dev.c

···
 
 #include <linux/module.h>
 #include <linux/rtc.h>
+#include <linux/smp_lock.h>
 #include "rtc-core.h"
 
 static dev_t rtc_devt;
···
 					struct rtc_device, char_dev);
 	const struct rtc_class_ops *ops = rtc->ops;
 
-	if (test_and_set_bit_lock(RTC_DEV_BUSY, &rtc->flags))
-		return -EBUSY;
+	lock_kernel();
+	if (test_and_set_bit_lock(RTC_DEV_BUSY, &rtc->flags)) {
+		err = -EBUSY;
+		goto out;
+	}
 
 	file->private_data = rtc;
 
···
 		rtc->irq_data = 0;
 		spin_unlock_irq(&rtc->irq_lock);
 
-		return 0;
+		goto out;
 	}
 
 	/* something has gone wrong */
 	clear_bit_unlock(RTC_DEV_BUSY, &rtc->flags);
+out:
+	unlock_kernel();
 	return err;
 }
 

drivers/rtc/rtc-m41t80.c

···
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/string.h>
 #include <linux/i2c.h>
 #include <linux/rtc.h>
···
 static int wdt_open(struct inode *inode, struct file *file)
 {
 	if (MINOR(inode->i_rdev) == WATCHDOG_MINOR) {
-		if (test_and_set_bit(0, &wdt_is_open))
+		lock_kernel();
+		if (test_and_set_bit(0, &wdt_is_open)) {
+			unlock_kernel();
 			return -EBUSY;
+		}
 		/*
 		 *	Activate
 		 */
 		wdt_is_open = 1;
+		unlock_kernel();
 		return 0;
 	}
 	return -ENODEV;

drivers/s390/block/dasd_eer.c

···
 #include <linux/device.h>
 #include <linux/poll.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 #include <asm/atomic.h>
···
 	eerb = kzalloc(sizeof(struct eerbuffer), GFP_KERNEL);
 	if (!eerb)
 		return -ENOMEM;
+	lock_kernel();
 	eerb->buffer_page_count = eer_pages;
 	if (eerb->buffer_page_count < 1 ||
 	    eerb->buffer_page_count > INT_MAX / PAGE_SIZE) {
···
 		MESSAGE(KERN_WARNING, "can't open device since module "
 			"parameter eer_pages is smaller then 1 or"
 			" bigger then %d", (int)(INT_MAX / PAGE_SIZE));
+		unlock_kernel();
 		return -EINVAL;
 	}
 	eerb->buffersize = eerb->buffer_page_count * PAGE_SIZE;
···
 			       GFP_KERNEL);
         if (!eerb->buffer) {
 		kfree(eerb);
+		unlock_kernel();
                 return -ENOMEM;
 	}
 	if (dasd_eer_allocate_buffer_pages(eerb->buffer,
 					   eerb->buffer_page_count)) {
 		kfree(eerb->buffer);
 		kfree(eerb);
+		unlock_kernel();
 		return -ENOMEM;
 	}
 	filp->private_data = eerb;
···
 	list_add(&eerb->list, &bufferlist);
 	spin_unlock_irqrestore(&bufferlock, flags);
 
+	unlock_kernel();
 	return nonseekable_open(inp,filp);
 }
 

drivers/s390/char/fs3270.c

···
 #include <linux/interrupt.h>
 #include <linux/list.h>
 #include <linux/types.h>
+#include <linux/smp_lock.h>
 
 #include <asm/ccwdev.h>
 #include <asm/cio.h>
···
 
 	if (imajor(filp->f_path.dentry->d_inode) != IBM_FS3270_MAJOR)
 		return -ENODEV;
+	lock_kernel();
 	minor = iminor(filp->f_path.dentry->d_inode);
 	/* Check for minor 0 multiplexer. */
 	if (minor == 0) {
···
 		tty = get_current_tty();
 		if (!tty || tty->driver->major != IBM_TTY3270_MAJOR) {
 			mutex_unlock(&tty_mutex);
-			return -ENODEV;
+			rc = -ENODEV;
+			goto out;
 		}
 		minor = tty->index + RAW3270_FIRSTMINOR;
 		mutex_unlock(&tty_mutex);
···
 	fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor);
 	if (!IS_ERR(fp)) {
 		raw3270_put_view(&fp->view);
-		return -EBUSY;
+		rc = -EBUSY;
+		goto out;
 	}
 	/* Allocate fullscreen view structure. */
 	fp = fs3270_alloc_view();
-	if (IS_ERR(fp))
-		return PTR_ERR(fp);
+	if (IS_ERR(fp)) {
+		rc = PTR_ERR(fp);
+		goto out;
+	}
 
 	init_waitqueue_head(&fp->wait);
 	fp->fs_pid = get_pid(task_pid(current));
 	rc = raw3270_add_view(&fp->view, &fs3270_fn, minor);
 	if (rc) {
 		fs3270_free_view(&fp->view);
-		return rc;
+		goto out;
 	}
 
 	/* Allocate idal-buffer. */
···
 	if (IS_ERR(ib)) {
 		raw3270_put_view(&fp->view);
 		raw3270_del_view(&fp->view);
-		return PTR_ERR(fp);
+		rc = PTR_ERR(fp);
+		goto out;
 	}
 	fp->rdbuf = ib;
 
···
 	if (rc) {
 		raw3270_put_view(&fp->view);
 		raw3270_del_view(&fp->view);
-		return rc;
+		goto out;
 	}
 	filp->private_data = fp;
+out:
+	unlock_kernel();
 	return 0;
 }
 

drivers/s390/char/monreader.c

···
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 #include <linux/errno.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
···
 	/*
 	 * only one user allowed
 	 */
+	lock_kernel();
 	rc = -EBUSY;
 	if (test_and_set_bit(MON_IN_USE, &mon_in_use))
 		goto out;
···
 		goto out_path;
 	}
 	filp->private_data = monpriv;
+	unlock_kernel();
 	return nonseekable_open(inode, filp);
 
 out_path:
···
 out_use:
 	clear_bit(MON_IN_USE, &mon_in_use);
 out:
+	unlock_kernel();
 	return rc;
 }
 

drivers/s390/char/monwriter.c

···
 #include <linux/moduleparam.h>
 #include <linux/init.h>
 #include <linux/errno.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/miscdevice.h>
···
 	monpriv = kzalloc(sizeof(struct mon_private), GFP_KERNEL);
 	if (!monpriv)
 		return -ENOMEM;
+	lock_kernel();
 	INIT_LIST_HEAD(&monpriv->list);
 	monpriv->hdr_to_read = sizeof(monpriv->hdr);
 	mutex_init(&monpriv->thread_mutex);
 	filp->private_data = monpriv;
+	unlock_kernel();
 	return nonseekable_open(inode, filp);
 }
 

drivers/s390/char/tape_char.c

···
 #include <linux/types.h>
 #include <linux/proc_fs.h>
 #include <linux/mtio.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 
···
 	if (imajor(filp->f_path.dentry->d_inode) != tapechar_major)
 		return -ENODEV;
 
+	lock_kernel();
 	minor = iminor(filp->f_path.dentry->d_inode);
 	device = tape_get_device(minor / TAPE_MINORS_PER_DEV);
 	if (IS_ERR(device)) {
 		DBF_EVENT(3, "TCHAR:open: tape_get_device() failed\n");
-		return PTR_ERR(device);
+		rc = PTR_ERR(device);
+		goto out;
 	}
 
 
 	rc = tape_open(device);
 	if (rc == 0) {
 		filp->private_data = device;
-		return nonseekable_open(inode, filp);
+		rc = nonseekable_open(inode, filp);
 	}
-	tape_put_device(device);
+	else
+		tape_put_device(device);
 
+out:
+	unlock_kernel();
 	return rc;
 }
 

drivers/s390/char/vmcp.c

···
 #include <linux/kernel.h>
 #include <linux/miscdevice.h>
 #include <linux/module.h>
+#include <linux/smp_lock.h>
 #include <asm/cpcmd.h>
 #include <asm/debug.h>
 #include <asm/uaccess.h>
···
 	session = kmalloc(sizeof(*session), GFP_KERNEL);
 	if (!session)
 		return -ENOMEM;
+
+	lock_kernel();
 	session->bufsize = PAGE_SIZE;
 	session->response = NULL;
 	session->resp_size = 0;
 	mutex_init(&session->mutex);
 	file->private_data = session;
+	unlock_kernel();
 	return nonseekable_open(inode, file);
 }
 

drivers/s390/char/vmlogrdr.c

···
 #include <linux/kmod.h>
 #include <linux/cdev.h>
 #include <linux/device.h>
+#include <linux/smp_lock.h>
 #include <linux/string.h>
 
 
···
 		return -ENOSYS;
 
 	/* Besure this device hasn't already been opened */
+	lock_kernel();
 	spin_lock_bh(&logptr->priv_lock);
 	if (logptr->dev_in_use)	{
 		spin_unlock_bh(&logptr->priv_lock);
+		unlock_kernel();
 		return -EBUSY;
 	}
 	logptr->dev_in_use = 1;
···
 		   || (logptr->iucv_path_severed));
 	if (logptr->iucv_path_severed)
 		goto out_record;
- 	return nonseekable_open(inode, filp);
+ 	ret = nonseekable_open(inode, filp);
+	unlock_kernel();
+	return ret;
 
 out_record:
 	if (logptr->autorecording)
···
 	logptr->path = NULL;
 out_dev:
 	logptr->dev_in_use = 0;
+	unlock_kernel();
 	return -EIO;
 }
 

drivers/s390/char/vmur.c

···
  */
 
 #include <linux/cdev.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 #include <asm/cio.h>
···
 
 	if (accmode == O_RDWR)
 		return -EACCES;
-
+	lock_kernel();
 	/*
 	 * We treat the minor number as the devno of the ur device
 	 * to find in the driver tree.
···
 	devno = MINOR(file->f_dentry->d_inode->i_rdev);
 
 	urd = urdev_get_from_devno(devno);
-	if (!urd)
-		return -ENXIO;
+	if (!urd) {
+		rc = -ENXIO;
+		goto out;
+	}
 
 	spin_lock(&urd->open_lock);
 	while (urd->open_flag) {
···
 		goto fail_urfile_free;
 	urf->file_reclen = rc;
 	file->private_data = urf;
+	unlock_kernel();
 	return 0;
 
 fail_urfile_free:
···
 	spin_unlock(&urd->open_lock);
 fail_put:
 	urdev_put(urd);
+out:
+	unlock_kernel();
 	return rc;
 }
 

drivers/s390/char/vmwatchdog.c

···
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/watchdog.h>
+#include <linux/smp_lock.h>
 
 #include <asm/ebcdic.h>
 #include <asm/io.h>
···
 static int vmwdt_open(struct inode *i, struct file *f)
 {
 	int ret;
-	if (test_and_set_bit(0, &vmwdt_is_open))
+	lock_kernel();
+	if (test_and_set_bit(0, &vmwdt_is_open)) {
+		unlock_kernel();
 		return -EBUSY;
+	}
 	ret = vmwdt_keepalive();
 	if (ret)
 		clear_bit(0, &vmwdt_is_open);
+	unlock_kernel();
 	return ret ? ret : nonseekable_open(i, f);
 }
 

drivers/s390/crypto/zcrypt_api.c

···
 #include <linux/fs.h>
 #include <linux/proc_fs.h>
 #include <linux/compat.h>
+#include <linux/smp_lock.h>
 #include <asm/atomic.h>
 #include <asm/uaccess.h>
 #include <linux/hw_random.h>
···
  */
 static int zcrypt_open(struct inode *inode, struct file *filp)
 {
+	lock_kernel();
 	atomic_inc(&zcrypt_open_count);
+	unlock_kernel();
 	return 0;
 }
 

drivers/sbus/char/bpp.c

···
 #include <linux/timer.h>
 #include <linux/ioport.h>
 #include <linux/major.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 #include <asm/io.h>
···
       unsigned minor = iminor(inode);
       int ret;
 
+      lock_kernel();
       spin_lock(&bpp_open_lock);
       ret = 0;
       if (minor >= BPP_NO) {
···
 	      }
       }
       spin_unlock(&bpp_open_lock);
+      unlock_kernel();
 
       return ret;
 }

drivers/sbus/char/cpwatchdog.c

···
 
 static int wd_open(struct inode *inode, struct file *f)
 {
+	lock_kernel();
 	switch(iminor(inode))
 	{
 		case WD0_MINOR:
···
 			f->private_data = &wd_dev.watchdog[WD2_ID];
 			break;
 		default:
+			unlock_kernel();
 			return(-ENODEV);
 	}
 
···
 						(void *)wd_dev.regs)) {
 			printk("%s: Cannot register IRQ %d\n", 
 				WD_OBPNAME, wd_dev.irq);
+			unlock_kernel();
 			return(-EBUSY);
 		}
 		wd_dev.initialized = 1;
 	}
 
+	unlock_kernel();
 	return(nonseekable_open(inode, f));
 }
 

drivers/sbus/char/display7seg.c

···
 {
 	if (D7S_MINOR != iminor(inode))
 		return -ENODEV;
+	cycle_kernel_lock();
 	atomic_inc(&d7s_users);
 	return 0;
 }

drivers/sbus/char/envctrl.c

···
 #include <linux/miscdevice.h>
 #include <linux/kmod.h>
 #include <linux/reboot.h>
+#include <linux/smp_lock.h>
 
 #include <asm/ebus.h>
 #include <asm/uaccess.h>
···
 static int
 envctrl_open(struct inode *inode, struct file *file)
 {
+	cycle_kernel_lock();
 	file->private_data = NULL;
 	return 0;
 }

drivers/sbus/char/flash.c

···
 static int
 flash_open(struct inode *inode, struct file *file)
 {
-	if (test_and_set_bit(0, (void *)&flash.busy) != 0)
+	lock_kernel();
+	if (test_and_set_bit(0, (void *)&flash.busy) != 0) {
+		unlock_kernel();
 		return -EBUSY;
+	}
 
+	unlock_kernel();
 	return 0;
 }
 

drivers/sbus/char/jsflash.c

···
  */
 
 #include <linux/module.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/miscdevice.h>
···
 
 static int jsf_open(struct inode * inode, struct file * filp)
 {
-
-	if (jsf0.base == 0) return -ENXIO;
-	if (test_and_set_bit(0, (void *)&jsf0.busy) != 0)
+	lock_kernel();
+	if (jsf0.base == 0) {
+		unlock_kernel();
+		return -ENXIO;
+	}
+	if (test_and_set_bit(0, (void *)&jsf0.busy) != 0) {
+		unlock_kernel();
 		return -EBUSY;
+	}
 
+	unlock_kernel();
 	return 0;	/* XXX What security? */
 }
 

drivers/sbus/char/openprom.c

···
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/string.h>
 #include <linux/miscdevice.h>
 #include <linux/init.h>
···
 	if (!data)
 		return -ENOMEM;
 
+	lock_kernel();
 	data->current_node = of_find_node_by_path("/");
 	data->lastnode = data->current_node;
 	file->private_data = (void *) data;
+	unlock_kernel();
 
 	return 0;
 }

drivers/sbus/char/riowatchdog.c

···
 #include <linux/errno.h>
 #include <linux/init.h>
 #include <linux/miscdevice.h>
+#include <linux/smp_lock.h>
 
 #include <asm/io.h>
 #include <asm/ebus.h>
···
 
 static int riowd_open(struct inode *inode, struct file *filp)
 {
+	cycle_kernel_lock();
 	nonseekable_open(inode, filp);
 	return 0;
 }

drivers/sbus/char/rtc.c

···
  */
 
 #include <linux/module.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/miscdevice.h>
···
 {
 	int ret;
 
+	lock_kernel();
 	spin_lock_irq(&mostek_lock);
 	if (rtc_busy) {
 		ret = -EBUSY;
···
 		ret = 0;
 	}
 	spin_unlock_irq(&mostek_lock);
+	unlock_kernel();
 
 	return ret;
 }

drivers/sbus/char/uctrl.c

···
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/ioport.h>
 #include <linux/init.h>
 #include <linux/miscdevice.h>
···
 static int
 uctrl_open(struct inode *inode, struct file *file)
 {
+	lock_kernel();
 	uctrl_get_event_status();
 	uctrl_get_external_status();
+	unlock_kernel();
 	return 0;
 }
 

drivers/sbus/char/vfc_dev.c

···
 #include <linux/spinlock.h>
 #include <linux/mutex.h>
 #include <linux/mm.h>
+#include <linux/smp_lock.h>
 
 #include <asm/openprom.h>
 #include <asm/oplib.h>
···
 {
 	struct vfc_dev *dev;
 
+	lock_kernel();
 	spin_lock(&vfc_dev_lock);
 	dev = vfc_get_dev_ptr(iminor(inode));
 	if (dev == NULL) {
 		spin_unlock(&vfc_dev_lock);
+		unlock_kernel();
 		return -ENODEV;
 	}
 	if (dev->busy) {
 		spin_unlock(&vfc_dev_lock);
+		unlock_kernel();
 		return -EBUSY;
 	}
 
···
 	vfc_captstat_reset(dev);
 	
 	vfc_unlock_device(dev);
+	unlock_kernel();
 	return 0;
 }
 

drivers/scsi/3w-9xxx.c

···
 #include <linux/pci.h>
 #include <linux/time.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 #include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/uaccess.h>
···
 } /* End twa_chrdev_ioctl() */
 
 /* This function handles open for the character device */
+/* NOTE that this function will race with remove. */
 static int twa_chrdev_open(struct inode *inode, struct file *file)
 {
 	unsigned int minor_number;
 	int retval = TW_IOCTL_ERROR_OS_ENODEV;
 
+	cycle_kernel_lock();
 	minor_number = iminor(inode);
 	if (minor_number >= twa_device_extension_count)
 		goto out;

drivers/scsi/3w-xxxx.c

···
 
 #include <linux/module.h>
 #include <linux/reboot.h>
+#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
 #include <linux/moduleparam.h>
···
 } /* End tw_chrdev_ioctl() */
 
 /* This function handles open for the character device */
+/* NOTE that this function races with remove. */
 static int tw_chrdev_open(struct inode *inode, struct file *file)
 {
 	unsigned int minor_number;
 
+	cycle_kernel_lock();
 	dprintk(KERN_WARNING "3w-xxxx: tw_ioctl_open()\n");
 
 	minor_number = iminor(inode);

drivers/scsi/aacraid/linit.c

···
 #include <linux/moduleparam.h>
 #include <linux/pci.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/syscalls.h>
 #include <linux/delay.h>
···
 	unsigned minor_number = iminor(inode);
 	int err = -ENODEV;
 
+	lock_kernel();  /* BKL pushdown: nothing else protects this list */
 	list_for_each_entry(aac, &aac_devices, entry) {
 		if (aac->id == minor_number) {
 			file->private_data = aac;
···
 			break;
 		}
 	}
+	unlock_kernel();
 
 	return err;
 }

drivers/scsi/ch.c

···
 #include <linux/chio.h>			/* here are all the ioctls */
 #include <linux/mutex.h>
 #include <linux/idr.h>
+#include <linux/smp_lock.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
···
 	scsi_changer *ch;
 	int minor = iminor(inode);
 
+	lock_kernel();
 	spin_lock(&ch_index_lock);
 	ch = idr_find(&ch_index_idr, minor);
 
 	if (NULL == ch || scsi_device_get(ch->device)) {
 		spin_unlock(&ch_index_lock);
+		unlock_kernel();
 		return -ENXIO;
 	}
 	spin_unlock(&ch_index_lock);
 
 	file->private_data = ch;
+	unlock_kernel();
 	return 0;
 }
 

drivers/scsi/dpt_i2o.c

···
 #include <linux/kernel.h>	/* for printk */
 #include <linux/sched.h>
 #include <linux/reboot.h>
+#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/dma-mapping.h>
 
···
 	int minor;
 	adpt_hba* pHba;
 
+	lock_kernel();
 	//TODO check for root access
 	//
 	minor = iminor(inode);
 	if (minor >= hba_count) {
+		unlock_kernel();
 		return -ENXIO;
 	}
 	mutex_lock(&adpt_configuration_lock);
···
 	}
 	if (pHba == NULL) {
 		mutex_unlock(&adpt_configuration_lock);
+		unlock_kernel();
 		return -ENXIO;
 	}
 
···
 
 	pHba->in_use = 1;
 	mutex_unlock(&adpt_configuration_lock);
+	unlock_kernel();
 
 	return 0;
 }

drivers/scsi/gdth.c

···
 #include <linux/timer.h>
 #include <linux/dma-mapping.h>
 #include <linux/list.h>
+#include <linux/smp_lock.h>
 
 #ifdef GDTH_RTC
 #include <linux/mc146818rtc.h>
···
 {
     gdth_ha_str *ha;
 
+    lock_kernel();
     list_for_each_entry(ha, &gdth_instances, list) {
         if (!ha->sdev)
             ha->sdev = scsi_get_host_dev(ha->shost);
     }
+    unlock_kernel();
 
     TRACE(("gdth_open()\n"));
     return 0;

drivers/scsi/megaraid.c

···
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/dma-mapping.h>
+#include <linux/smp_lock.h>
 #include <scsi/scsicam.h>
 
 #include "scsi.h"
···
  * @filep - unused
  *
  * Routines for the character/ioctl interface to the driver. Find out if this
- * is a valid open. If yes, increment the module use count so that it cannot
- * be unloaded.
+ * is a valid open. 
  */
 static int
 megadev_open (struct inode *inode, struct file *filep)
 {
+	cycle_kernel_lock();
 	/*
 	 * Only allow superuser to access private ioctl interface
 	 */

drivers/scsi/megaraid/megaraid_mm.c

···
  * Common management module
  */
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include "megaraid_mm.h"
 
 
···
 	 */
 	if (!capable(CAP_SYS_ADMIN)) return (-EACCES);
 
+	cycle_kernel_lock();
 	return 0;
 }
 

drivers/scsi/megaraid/megaraid_sas.c

···
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
+#include <linux/smp_lock.h>
 #include <linux/uio.h>
 #include <asm/uaccess.h>
 #include <linux/fs.h>
···
  */
 static int megasas_mgmt_open(struct inode *inode, struct file *filep)
 {
+	cycle_kernel_lock();
 	/*
 	 * Allow only those users with admin rights
 	 */

drivers/scsi/osst.c

···
 #include <linux/moduleparam.h>
 #include <linux/delay.h>
 #include <linux/jiffies.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <asm/dma.h>
 #include <asm/system.h>
···
 
 
 /* Open the device */
-static int os_scsi_tape_open(struct inode * inode, struct file * filp)
+static int __os_scsi_tape_open(struct inode * inode, struct file * filp)
 {
 	unsigned short	      flags;
 	int		      i, b_size, new_session = 0, retval = 0;
···
 
 	return retval;
 }
+
+/* BKL pushdown: spaghetti avoidance wrapper */
+static int os_scsi_tape_open(struct inode * inode, struct file * filp)
+{
+	int ret;
+
+	lock_kernel();
+	ret = __os_scsi_tape_open(inode, filp);
+	unlock_kernel();
+	return ret;
+}
+
 
 
 /* Flush the tape buffer before close */

drivers/scsi/scsi_tgt_if.c

···
  */
 #include <linux/miscdevice.h>
 #include <linux/file.h>
+#include <linux/smp_lock.h>
 #include <net/tcp.h>
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
···
 {
 	tx_ring.tr_idx = rx_ring.tr_idx = 0;
 
+	cycle_kernel_lock();
 	return 0;
 }
 

drivers/scsi/sg.c

···
 #include <linux/delay.h>
 #include <linux/scatterlist.h>
 #include <linux/blktrace_api.h>
+#include <linux/smp_lock.h>
 
 #include "scsi.h"
 #include <scsi/scsi_dbg.h>
···
 	int res;
 	int retval;
 
+	lock_kernel();
 	nonseekable_open(inode, filp);
 	SCSI_LOG_TIMEOUT(3, printk("sg_open: dev=%d, flags=0x%x\n", dev, flags));
 	sdp = sg_get_dev(dev);
-	if ((!sdp) || (!sdp->device))
+	if ((!sdp) || (!sdp->device)) {
+		unlock_kernel();
 		return -ENXIO;
-	if (sdp->detached)
+	}
+	if (sdp->detached) {
+		unlock_kernel();
 		return -ENODEV;
+	}
 
 	/* This driver's module count bumped by fops_get in <linux/fs.h> */
 	/* Prevent the device driver from vanishing while we sleep */
 	retval = scsi_device_get(sdp->device);
-	if (retval)
+	if (retval) {
+		unlock_kernel();
 		return retval;
+	}
 
 	if (!((flags & O_NONBLOCK) ||
 	      scsi_block_when_processing_errors(sdp->device))) {
···
 		retval = -ENOMEM;
 		goto error_out;
 	}
+	unlock_kernel();
 	return 0;
 
       error_out:
 	scsi_device_put(sdp->device);
+	unlock_kernel();
 	return retval;
 }
 

drivers/scsi/st.c

···
 #include <linux/cdev.h>
 #include <linux/delay.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 #include <asm/dma.h>
···
 }
 
 
-/* Open the device. Needs to be called with BKL only because of incrementing the SCSI host
+/* Open the device. Needs to take the BKL only because of incrementing the SCSI host
    module count. */
 static int st_open(struct inode *inode, struct file *filp)
 {
···
 	int dev = TAPE_NR(inode);
 	char *name;
 
+	lock_kernel();
 	/*
 	 * We really want to do nonseekable_open(inode, filp); here, but some
 	 * versions of tar incorrectly call lseek on tapes and bail out if that
···
 	 */
 	filp->f_mode &= ~(FMODE_PREAD | FMODE_PWRITE);
 
-	if (!(STp = scsi_tape_get(dev)))
+	if (!(STp = scsi_tape_get(dev))) {
+		unlock_kernel();
 		return -ENXIO;
+	}
 
 	write_lock(&st_dev_arr_lock);
 	filp->private_data = STp;
···
 	if (STp->in_use) {
 		write_unlock(&st_dev_arr_lock);
 		scsi_tape_put(STp);
+		unlock_kernel();
 		DEB( printk(ST_DEB_MSG "%s: Device already in use.\n", name); )
 		return (-EBUSY);
 	}
···
 			retval = (-EIO);
 		goto err_out;
 	}
+	unlock_kernel();
 	return 0;
 
  err_out:
 	normalize_buffer(STp->buffer);
 	STp->in_use = 0;
 	scsi_tape_put(STp);
+	unlock_kernel();
 	return retval;
 
 }

drivers/spi/spidev.c

···
 #include <linux/errno.h>
 #include <linux/mutex.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 
 #include <linux/spi/spi.h>
 #include <linux/spi/spidev.h>
···
 	struct spidev_data	*spidev;
 	int			status = -ENXIO;
 
+	lock_kernel();
 	mutex_lock(&device_list_lock);
 
 	list_for_each_entry(spidev, &device_list, device_entry) {
···
 		pr_debug("spidev: nothing for minor %d\n", iminor(inode));
 
 	mutex_unlock(&device_list_lock);
+	unlock_kernel();
 	return status;
 }
 

drivers/telephony/phonedev.c

···
 #include <linux/errno.h>
 #include <linux/phonedev.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 #include <asm/system.h>
 
···
 	if (minor >= PHONE_NUM_DEVICES)
 		return -ENODEV;
 
+	lock_kernel();
 	mutex_lock(&phone_lock);
 	p = phone_device[minor];
 	if (p)
···
 	fops_put(old_fops);
 end:
 	mutex_unlock(&phone_lock);
+	unlock_kernel();
 	return err;
 }
 

drivers/uio/uio.c

···
 	struct uio_listener *listener;
 	int ret = 0;
 
+	lock_kernel();
 	idev = idr_find(&uio_idr, iminor(inode));
-	if (!idev)
-		return -ENODEV;
+	if (!idev) {
+		ret = -ENODEV;
+		goto out;
+	}
 
-	if (!try_module_get(idev->owner))
-		return -ENODEV;
+	if (!try_module_get(idev->owner)) {
+		ret = -ENODEV;
+		goto out;
+	}
 
 	listener = kmalloc(sizeof(*listener), GFP_KERNEL);
 	if (!listener) {
···
 		if (ret)
 			goto err_infoopen;
 	}
-
+	unlock_kernel();
 	return 0;
 
 err_infoopen:
···
 
 	module_put(idev->owner);
 
+out:
+	unlock_kernel();
 	return ret;
 }
 

drivers/usb/core/devio.c

···
 	struct dev_state *ps;
 	int ret;
 
+	lock_kernel();
 	/* Protect against simultaneous removal or release */
 	mutex_lock(&usbfs_mutex);
 
···
 	if (ret)
 		kfree(ps);
 	mutex_unlock(&usbfs_mutex);
+	unlock_kernel();
 	return ret;
 }
 

drivers/usb/core/file.c

···
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/rwsem.h>
+#include <linux/smp_lock.h>
 #include <linux/usb.h>
 
 #include "usb.h"
···
 	int err = -ENODEV;
 	const struct file_operations *old_fops, *new_fops = NULL;
 
+	lock_kernel();
 	down_read(&minor_rwsem);
 	c = usb_minors[minor];
 
···
 	fops_put(old_fops);
  done:
 	up_read(&minor_rwsem);
+	unlock_kernel();
 	return err;
 }
 

drivers/usb/gadget/printer.c

···
 	unsigned long		flags;
 	int			ret = -EBUSY;
 
+	lock_kernel();
 	dev = container_of(inode->i_cdev, struct printer_dev, printer_cdev);
 
 	spin_lock_irqsave(&dev->lock, flags);
···
 	spin_unlock_irqrestore(&dev->lock, flags);
 
 	DBG(dev, "printer_open returned %x\n", ret);
-
+	unlock_kernel();
 	return ret;
 }
 

drivers/usb/mon/mon_bin.c

···
 #include <linux/poll.h>
 #include <linux/compat.h>
 #include <linux/mm.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 
···
 	size_t size;
 	int rc;
 
+	lock_kernel();
 	mutex_lock(&mon_lock);
 	if ((mbus = mon_bus_lookup(iminor(inode))) == NULL) {
 		mutex_unlock(&mon_lock);
+		unlock_kernel();
 		return -ENODEV;
 	}
 	if (mbus != &mon_bus0 && mbus->u_bus == NULL) {
 		printk(KERN_ERR TAG ": consistency error on open\n");
 		mutex_unlock(&mon_lock);
+		unlock_kernel();
 		return -ENODEV;
 	}
 
···
 
 	file->private_data = rp;
 	mutex_unlock(&mon_lock);
+	unlock_kernel();
 	return 0;
 
 err_allocbuff:
···
 	kfree(rp);
 err_alloc:
 	mutex_unlock(&mon_lock);
+	unlock_kernel();
 	return rc;
 }
 

drivers/video/fbmem.c

···
 
 	if (fbidx >= FB_MAX)
 		return -ENODEV;
+	lock_kernel();
 #ifdef CONFIG_KMOD
 	if (!(info = registered_fb[fbidx]))
 		try_to_load(fbidx);
 #endif /* CONFIG_KMOD */
-	if (!(info = registered_fb[fbidx]))
-		return -ENODEV;
-	if (!try_module_get(info->fbops->owner))
-		return -ENODEV;
+	if (!(info = registered_fb[fbidx])) {
+		res = -ENODEV;
+		goto out;
+	}
+	if (!try_module_get(info->fbops->owner)) {
+		res = -ENODEV;
+		goto out;
+	}
 	file->private_data = info;
 	if (info->fbops->fb_open) {
 		res = info->fbops->fb_open(info,1);
 		if (res)
 			module_put(info->fbops->owner);
 	}
+out:
+	unlock_kernel();
 	return res;
 }
 

fs/char_dev.c

···
 			return -ENXIO;
 		new = container_of(kobj, struct cdev, kobj);
 		spin_lock(&cdev_lock);
+		/* Check i_cdev again in case somebody beat us to it while
+		   we dropped the lock. */
 		p = inode->i_cdev;
 		if (!p) {
 			inode->i_cdev = p = new;
···
 		cdev_put(p);
 		return -ENXIO;
 	}
-	if (filp->f_op->open) {
-		lock_kernel();
+	if (filp->f_op->open)
 		ret = filp->f_op->open(inode,filp);
-		unlock_kernel();
-	}
 	if (ret)
 		cdev_put(p);
 	return ret;

fs/cifs/cifsfs.c

···
 		if (retval < 0)
 			return (loff_t)retval;
 	}
-	return remote_llseek(file, offset, origin);
+	return generic_file_llseek_unlocked(file, offset, origin);
 }
 
 struct file_system_type cifs_fs_type = {

fs/dlm/user.c

···
 #include <linux/poll.h>
 #include <linux/signal.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 #include <linux/dlm.h>
 #include <linux/dlm_device.h>
 
···
 	struct dlm_user_proc *proc;
 	struct dlm_ls *ls;
 
+	lock_kernel();
 	ls = dlm_find_lockspace_device(iminor(inode));
-	if (!ls)
+	if (!ls) {
+		unlock_kernel();
 		return -ENOENT;
+	}
 
 	proc = kzalloc(sizeof(struct dlm_user_proc), GFP_KERNEL);
 	if (!proc) {
 		dlm_put_lockspace(ls);
+		unlock_kernel();
 		return -ENOMEM;
 	}
 
···
 	spin_lock_init(&proc->locks_spin);
 	init_waitqueue_head(&proc->wait);
 	file->private_data = proc;
+	unlock_kernel();
 
 	return 0;
 }
···
 
 static int ctl_device_open(struct inode *inode, struct file *file)
 {
+	cycle_kernel_lock();
 	file->private_data = NULL;
 	return 0;
 }

fs/ecryptfs/file.c

···
 #include <linux/security.h>
 #include <linux/compat.h>
 #include <linux/fs_stack.h>
+#include <linux/smp_lock.h>
 #include "ecryptfs_kernel.h"
 
 /**
···
 	int rc = 0;
 	struct file *lower_file = NULL;
 
+	lock_kernel();
 	lower_file = ecryptfs_file_to_lower(file);
 	if (lower_file->f_op && lower_file->f_op->fasync)
 		rc = lower_file->f_op->fasync(fd, lower_file, flag);
+	unlock_kernel();
 	return rc;
 }
 

fs/fat/cache.c

···
 
 static inline struct fat_cache *fat_cache_alloc(struct inode *inode)
 {
-	return kmem_cache_alloc(fat_cache_cachep, GFP_KERNEL);
+	return kmem_cache_alloc(fat_cache_cachep, GFP_NOFS);
 }
 
 static inline void fat_cache_free(struct fat_cache *cache)

fs/fat/dir.c

···
 	loff_t cpos;
 	int ret = 0;
 
-	lock_kernel();
+	lock_super(sb);
 
 	cpos = filp->f_pos;
 	/* Fake . and .. for the root directory. */
···
 	if (unicode)
 		__putname(unicode);
 out:
-	unlock_kernel();
+	unlock_super(sb);
 	return ret;
 }
 

fs/fat/file.c

···
 #include <linux/mount.h>
 #include <linux/time.h>
 #include <linux/msdos_fs.h>
-#include <linux/smp_lock.h>
 #include <linux/buffer_head.h>
 #include <linux/writeback.h>
 #include <linux/backing-dev.h>
···
 
 	nr_clusters = (inode->i_size + (cluster_size - 1)) >> sbi->cluster_bits;
 
-	lock_kernel();
 	fat_free(inode, nr_clusters);
-	unlock_kernel();
 	fat_flush_inodes(inode->i_sb, inode, NULL);
 }
 
···
 	int error = 0;
 	unsigned int ia_valid;
 
-	lock_kernel();
-
 	/*
 	 * Expand the file. Since inode_setattr() updates ->i_size
 	 * before calling the ->truncate(), but FAT needs to fill the
···
 
 	error = inode_setattr(inode, attr);
 out:
-	unlock_kernel();
 	return error;
 }
 EXPORT_SYMBOL_GPL(fat_setattr);

fs/fat/inode.c

···
 
 static void fat_clear_inode(struct inode *inode)
 {
-	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
+	struct super_block *sb = inode->i_sb;
+	struct msdos_sb_info *sbi = MSDOS_SB(sb);
 
-	lock_kernel();
 	spin_lock(&sbi->inode_hash_lock);
 	fat_cache_inval_inode(inode);
 	hlist_del_init(&MSDOS_I(inode)->i_fat_hash);
 	spin_unlock(&sbi->inode_hash_lock);
-	unlock_kernel();
 }
 
 static void fat_write_super(struct super_block *sb)
···
 static struct inode *fat_alloc_inode(struct super_block *sb)
 {
 	struct msdos_inode_info *ei;
-	ei = kmem_cache_alloc(fat_inode_cachep, GFP_KERNEL);
+	ei = kmem_cache_alloc(fat_inode_cachep, GFP_NOFS);
 	if (!ei)
 		return NULL;
 	return &ei->vfs_inode;
···
 	if (inode->i_ino == MSDOS_ROOT_INO || !i_pos)
 		return 0;
 
-	lock_kernel();
+	lock_super(sb);
 	bh = sb_bread(sb, i_pos >> sbi->dir_per_block_bits);
 	if (!bh) {
 		printk(KERN_ERR "FAT: unable to read inode block "
···
 	if (i_pos != MSDOS_I(inode)->i_pos) {
 		spin_unlock(&sbi->inode_hash_lock);
 		brelse(bh);
-		unlock_kernel();
+		unlock_super(sb);
 		goto retry;
 	}
 
···
 		err = sync_dirty_buffer(bh);
 	brelse(bh);
 out:
-	unlock_kernel();
+	unlock_super(sb);
 	return err;
 }
 
···
 
 static struct dentry *fat_get_parent(struct dentry *child)
 {
+	struct super_block *sb = child->d_sb;
 	struct buffer_head *bh;
 	struct msdos_dir_entry *de;
 	loff_t i_pos;
···
 	struct inode *inode;
 	int err;
 
-	lock_kernel();
+	lock_super(sb);
 
 	err = fat_get_dotdot_entry(child->d_inode, &bh, &de, &i_pos);
 	if (err) {
 		parent = ERR_PTR(err);
 		goto out;
 	}
-	inode = fat_build_inode(child->d_sb, de, i_pos);
+	inode = fat_build_inode(sb, de, i_pos);
 	brelse(bh);
 	if (IS_ERR(inode)) {
 		parent = ERR_CAST(inode);
···
 		parent = ERR_PTR(-ENOMEM);
 	}
 out:
-	unlock_kernel();
+	unlock_super(sb);
 
 	return parent;
 }
···
 	long error;
 	char buf[50];
 
+	/*
+	 * GFP_KERNEL is ok here, because while we do hold the
+	 * supeblock lock, memory pressure can't call back into
+	 * the filesystem, since we're only just about to mount
+	 * it and have no inodes etc active!
+	 */
 	sbi = kzalloc(sizeof(struct msdos_sb_info), GFP_KERNEL);
 	if (!sbi)
 		return -ENOMEM;

fs/fcntl.c

···
 #include <linux/fdtable.h>
 #include <linux/capability.h>
 #include <linux/dnotify.h>
-#include <linux/smp_lock.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/security.h>
···
 	if (error)
 		return error;
 
-	lock_kernel();
 	if ((arg ^ filp->f_flags) & FASYNC) {
 		if (filp->f_op && filp->f_op->fasync) {
 			error = filp->f_op->fasync(fd, filp, (arg & FASYNC) != 0);
···
 
 	filp->f_flags = (arg & SETFL_MASK) | (filp->f_flags & ~SETFL_MASK);
  out:
-	unlock_kernel();
 	return error;
 }
 

fs/gfs2/ops_file.c

···
 		error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
 					   &i_gh);
 		if (!error) {
-			error = remote_llseek(file, offset, origin);
+			error = generic_file_llseek_unlocked(file, offset, origin);
 			gfs2_glock_dq_uninit(&i_gh);
 		}
 	} else
-		error = remote_llseek(file, offset, origin);
+		error = generic_file_llseek_unlocked(file, offset, origin);
 
 	return error;
 }

fs/msdos/namei.c

···
 
 	dentry->d_op = &msdos_dentry_operations;
 
-	lock_kernel();
+	lock_super(sb);
 	res = msdos_find(dir, dentry->d_name.name, dentry->d_name.len, &sinfo);
 	if (res == -ENOENT)
 		goto add;
···
 	if (dentry)
 		dentry->d_op = &msdos_dentry_operations;
 out:
-	unlock_kernel();
+	unlock_super(sb);
 	if (!res)
 		return dentry;
 	return ERR_PTR(res);
···
 	unsigned char msdos_name[MSDOS_NAME];
 	int err, is_hid;
 
-	lock_kernel();
+	lock_super(sb);
 
 	err = msdos_format_name(dentry->d_name.name, dentry->d_name.len,
 				msdos_name, &MSDOS_SB(sb)->options);
···
 
 	d_instantiate(dentry, inode);
 out:
-	unlock_kernel();
+	unlock_super(sb);
 	if (!err)
 		err = fat_flush_inodes(sb, dir, inode);
 	return err;
···
 /***** Remove a directory */
 static int msdos_rmdir(struct inode *dir, struct dentry *dentry)
 {
+	struct super_block *sb = dir->i_sb;
 	struct inode *inode = dentry->d_inode;
 	struct fat_slot_info sinfo;
 	int err;
 
-	lock_kernel();
+	lock_super(sb);
 	/*
 	 * Check whether the directory is not in use, then check
 	 * whether it is empty.
···
 	inode->i_ctime = CURRENT_TIME_SEC;
 	fat_detach(inode);
 out:
-	unlock_kernel();
+	unlock_super(sb);
 	if (!err)
-		err = fat_flush_inodes(inode->i_sb, dir, inode);
+		err = fat_flush_inodes(sb, dir, inode);
 
 	return err;
 }
···
 	struct timespec ts;
 	int err, is_hid, cluster;
 
-	lock_kernel();
+	lock_super(sb);
 
 	err = msdos_format_name(dentry->d_name.name, dentry->d_name.len,
 				msdos_name, &MSDOS_SB(sb)->options);
···
 
 	d_instantiate(dentry, inode);
 
-	unlock_kernel();
+	unlock_super(sb);
 	fat_flush_inodes(sb, dir, inode);
 	return 0;
 
 out_free:
 	fat_free_clusters(dir, cluster);
 out:
-	unlock_kernel();
+	unlock_super(sb);
 	return err;
 }
 
···
 static int msdos_unlink(struct inode *dir, struct dentry *dentry)
 {
 	struct inode *inode = dentry->d_inode;
+	struct super_block *sb= inode->i_sb;
 	struct fat_slot_info sinfo;
 	int err;
 
-	lock_kernel();
+	lock_super(sb);
 	err = msdos_find(dir, dentry->d_name.name, dentry->d_name.len, &sinfo);
 	if (err)
 		goto out;
···
 	inode->i_ctime = CURRENT_TIME_SEC;
 	fat_detach(inode);
 out:
-	unlock_kernel();
+	unlock_super(sb);
 	if (!err)
-		err = fat_flush_inodes(inode->i_sb, dir, inode);
+		err = fat_flush_inodes(sb, dir, inode);
 
 	return err;
 }
···
 static int msdos_rename(struct inode *old_dir, struct dentry *old_dentry,
 			struct inode *new_dir, struct dentry *new_dentry)
 {
+	struct super_block *sb = old_dir->i_sb;
 	unsigned char old_msdos_name[MSDOS_NAME], new_msdos_name[MSDOS_NAME];
 	int err, is_hid;
 
-	lock_kernel();
+	lock_super(sb);
 
 	err = msdos_format_name(old_dentry->d_name.name,
 				old_dentry->d_name.len, old_msdos_name,
···
 	err = do_msdos_rename(old_dir, old_msdos_name, old_dentry,
 			      new_dir, new_msdos_name, new_dentry, is_hid);
 out:
-	unlock_kernel();
+	unlock_super(sb);
 	if (!err)
-		err = fat_flush_inodes(old_dir->i_sb, old_dir, new_dir);
+		err = fat_flush_inodes(sb, old_dir, new_dir);
 	return err;
 }
 

fs/ncpfs/file.c

···
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 
 #include <linux/ncp_fs.h>
 #include "ncplib_kernel.h"
···
 	return 0;
 }
 
+static loff_t ncp_remote_llseek(struct file *file, loff_t offset, int origin)
+{
+	loff_t ret;
+	lock_kernel();
+	ret = generic_file_llseek_unlocked(file, offset, origin);
+	unlock_kernel();
+	return ret;
+}
+
 const struct file_operations ncp_file_operations =
 {
-	.llseek		= remote_llseek,
+	.llseek 	= ncp_remote_llseek,
 	.read		= ncp_file_read,
 	.write		= ncp_file_write,
 	.ioctl		= ncp_ioctl,

fs/nfs/file.c

···
 
 static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
 {
+	loff_t loff;
 	/* origin == SEEK_END => we must revalidate the cached file length */
 	if (origin == SEEK_END) {
 		struct inode *inode = filp->f_mapping->host;
···
 		if (retval < 0)
 			return (loff_t)retval;
 	}
-	return remote_llseek(filp, offset, origin);
+	lock_kernel();	/* BKL needed? */
+	loff = generic_file_llseek_unlocked(filp, offset, origin);
+	unlock_kernel();
+	return loff;
 }
 
 /*

fs/ocfs2/stack_user.c

···
 #include <linux/fs.h>
 #include <linux/miscdevice.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 #include <linux/reboot.h>
 #include <asm/uaccess.h>
 
···
 		return -ENOMEM;
 	p->op_this_node = -1;
 
+	lock_kernel();
 	mutex_lock(&ocfs2_control_lock);
 	file->private_data = p;
 	list_add(&p->op_list, &ocfs2_control_private_list);
 	mutex_unlock(&ocfs2_control_lock);
+	unlock_kernel();
 
 	return 0;
 }

fs/read_write.c

···
 
 EXPORT_SYMBOL(generic_ro_fops);
 
-loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
+loff_t
+generic_file_llseek_unlocked(struct file *file, loff_t offset, int origin)
 {
 	loff_t retval;
 	struct inode *inode = file->f_mapping->host;
 
-	mutex_lock(&inode->i_mutex);
 	switch (origin) {
 		case SEEK_END:
 			offset += inode->i_size;
···
 	}
 	retval = -EINVAL;
 	if (offset>=0 && offset<=inode->i_sb->s_maxbytes) {
+		/* Special lock needed here? */
 		if (offset != file->f_pos) {
 			file->f_pos = offset;
 			file->f_version = 0;
 		}
 		retval = offset;
 	}
-	mutex_unlock(&inode->i_mutex);
 	return retval;
 }
+EXPORT_SYMBOL(generic_file_llseek_unlocked);
 
-EXPORT_SYMBOL(generic_file_llseek);
-
-loff_t remote_llseek(struct file *file, loff_t offset, int origin)
+loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
 {
-	loff_t retval;
-
-	lock_kernel();
-	switch (origin) {
-		case SEEK_END:
-			offset += i_size_read(file->f_path.dentry->d_inode);
-			break;
-		case SEEK_CUR:
-			offset += file->f_pos;
-	}
-	retval = -EINVAL;
-	if (offset>=0 && offset<=file->f_path.dentry->d_inode->i_sb->s_maxbytes) {
-		if (offset != file->f_pos) {
-			file->f_pos = offset;
-			file->f_version = 0;
-		}
-		retval = offset;
-	}
-	unlock_kernel();
-	return retval;
+	loff_t n;
+	mutex_lock(&file->f_dentry->d_inode->i_mutex);
+	n = generic_file_llseek_unlocked(file, offset, origin);
+	mutex_unlock(&file->f_dentry->d_inode->i_mutex);
+	return n;
 }
-EXPORT_SYMBOL(remote_llseek);
+EXPORT_SYMBOL(generic_file_llseek);
 
 loff_t no_llseek(struct file *file, loff_t offset, int origin)
 {

fs/smbfs/file.c

···
 	return error;
 }
 
+static loff_t smb_remote_llseek(struct file *file, loff_t offset, int origin)
+{
+	loff_t ret;
+	lock_kernel();
+	ret = generic_file_llseek_unlocked(file, offset, origin);
+	unlock_kernel();
+	return ret;
+}
+
 const struct file_operations smb_file_operations =
 {
-	.llseek		= remote_llseek,
+	.llseek 	= smb_remote_llseek,
 	.read		= do_sync_read,
 	.aio_read	= smb_file_aio_read,
 	.write		= do_sync_write,

fs/vfat/namei.c

···
 	if (len == 0)
 		return -ENOENT;
 
-	slots = kmalloc(sizeof(*slots) * MSDOS_SLOTS, GFP_KERNEL);
+	slots = kmalloc(sizeof(*slots) * MSDOS_SLOTS, GFP_NOFS);
 	if (slots == NULL)
 		return -ENOMEM;
 
···
 	struct dentry *alias;
 	int err, table;
 
-	lock_kernel();
+	lock_super(sb);
 	table = (MSDOS_SB(sb)->options.name_check == 's') ? 2 : 0;
 	dentry->d_op = &vfat_dentry_ops[table];
 
···
 	inode = fat_build_inode(sb, sinfo.de, sinfo.i_pos);
 	brelse(sinfo.bh);
 	if (IS_ERR(inode)) {
-		unlock_kernel();
+		unlock_super(sb);
 		return ERR_CAST(inode);
 	}
 	alias = d_find_alias(inode);
···
 			dput(alias);
 		else {
 			iput(inode);
-			unlock_kernel();
+			unlock_super(sb);
 			return alias;
 		}
 
 	}
 error:
-	unlock_kernel();
+	unlock_super(sb);
 	dentry->d_op = &vfat_dentry_ops[table];
 	dentry->d_time = dentry->d_parent->d_inode->i_version;
 	dentry = d_splice_alias(inode, dentry);
···
 	struct timespec ts;
 	int err;
 
-	lock_kernel();
+	lock_super(sb);
 
 	ts = CURRENT_TIME_SEC;
 	err = vfat_add_entry(dir, &dentry->d_name, 0, 0, &ts, &sinfo);
···
 	dentry->d_time = dentry->d_parent->d_inode->i_version;
 	d_instantiate(dentry, inode);
 out:
-	unlock_kernel();
+	unlock_super(sb);
 	return err;
 }
 
 static int vfat_rmdir(struct inode *dir, struct dentry *dentry)
 {
 	struct inode *inode = dentry->d_inode;
+	struct super_block *sb = dir->i_sb;
 	struct fat_slot_info sinfo;
 	int err;
 
-	lock_kernel();
+	lock_super(sb);
 
 	err = fat_dir_empty(inode);
 	if (err)
···
 	inode->i_mtime = inode->i_atime = CURRENT_TIME_SEC;
 	fat_detach(inode);
 out:
-	unlock_kernel();
+	unlock_super(sb);
 
 	return err;
 }
···
 static int vfat_unlink(struct inode *dir, struct dentry *dentry)
 {
 	struct inode *inode = dentry->d_inode;
+	struct super_block *sb = dir->i_sb;
 	struct fat_slot_info sinfo;
 	int err;
 
-	lock_kernel();
+	lock_super(sb);
 
 	err = vfat_find(dir, &dentry->d_name, &sinfo);
 	if (err)
···
 	inode->i_mtime = inode->i_atime = CURRENT_TIME_SEC;
 	fat_detach(inode);
 out:
-	unlock_kernel();
+	unlock_super(sb);
 
 	return err;
 }
···
 	struct timespec ts;
 	int err, cluster;
 
-	lock_kernel();
+	lock_super(sb);
 
 	ts = CURRENT_TIME_SEC;
 	cluster = fat_alloc_new_dir(dir, &ts);
···
 	dentry->d_time = dentry->d_parent->d_inode->i_version;
 	d_instantiate(dentry, inode);
 
-	unlock_kernel();
+	unlock_super(sb);
 	return 0;
 
 out_free:
 	fat_free_clusters(dir, cluster);
 out:
-	unlock_kernel();
+	unlock_super(sb);
 	return err;
 }
 
···
 	struct timespec ts;
 	loff_t dotdot_i_pos, new_i_pos;
 	int err, is_dir, update_dotdot, corrupt = 0;
+	struct super_block *sb = old_dir->i_sb;
 
 	old_sinfo.bh = sinfo.bh = dotdot_bh = NULL;
 	old_inode = old_dentry->d_inode;
 	new_inode = new_dentry->d_inode;
-	lock_kernel();
+	lock_super(sb);
 	err = vfat_find(old_dir, &old_dentry->d_name, &old_sinfo);
 	if (err)
 		goto out;
···
 	brelse(sinfo.bh);
 	brelse(dotdot_bh);
 	brelse(old_sinfo.bh);
-	unlock_kernel();
+	unlock_super(sb);
 
 	return err;
 

include/linux/fs.h

···
 file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping);
 extern loff_t no_llseek(struct file *file, loff_t offset, int origin);
 extern loff_t generic_file_llseek(struct file *file, loff_t offset, int origin);
-extern loff_t remote_llseek(struct file *file, loff_t offset, int origin);
+extern loff_t generic_file_llseek_unlocked(struct file *file, loff_t offset,
+			int origin);
 extern int generic_file_open(struct inode * inode, struct file * filp);
 extern int nonseekable_open(struct inode * inode, struct file * filp);
 

include/linux/smp_lock.h

···
 extern void __lockfunc lock_kernel(void)	__acquires(kernel_lock);
 extern void __lockfunc unlock_kernel(void)	__releases(kernel_lock);
 
+/*
+ * Various legacy drivers don't really need the BKL in a specific
+ * function, but they *do* need to know that the BKL became available.
+ * This function just avoids wrapping a bunch of lock/unlock pairs
+ * around code which doesn't really need it.
+ */
+static inline void cycle_kernel_lock(void)
+{
+	lock_kernel();
+	unlock_kernel();
+}
+
 #else
 
 #define lock_kernel()				do { } while(0)
 #define unlock_kernel()				do { } while(0)
 #define release_kernel_lock(task)		do { } while(0)
+#define cycle_kernel_lock()			do { } while(0)
 #define reacquire_kernel_lock(task)		0
 #define kernel_locked()				1
 

kernel/pm_qos_params.c

···
 
 #include <linux/pm_qos_params.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/time.h>
···
 	int ret;
 	long pm_qos_class;
 
+	lock_kernel();
 	pm_qos_class = find_pm_qos_object_by_minor(iminor(inode));
 	if (pm_qos_class >= 0) {
 		filp->private_data = (void *)pm_qos_class;
 		sprintf(name, "process_%d", current->pid);
 		ret = pm_qos_add_requirement(pm_qos_class, name,
 					PM_QOS_DEFAULT_VALUE);
-		if (ret >= 0)
+		if (ret >= 0) {
+			unlock_kernel();
 			return 0;
+		}
 	}
+	unlock_kernel();
 
 	return -EPERM;
 }

net/irda/irnet/irnet.h

···
 #include <linux/module.h>
 
 #include <linux/kernel.h>
+#include <linux/smp_lock.h>
 #include <linux/skbuff.h>
 #include <linux/tty.h>
 #include <linux/proc_fs.h>

net/irda/irnet/irnet_ppp.c

···
   ap = kzalloc(sizeof(*ap), GFP_KERNEL);
   DABORT(ap == NULL, -ENOMEM, FS_ERROR, "Can't allocate struct irnet...\n");
 
+  lock_kernel();
   /* initialize the irnet structure */
   ap->file = file;
 
···
     {
       DERROR(FS_ERROR, "Can't setup IrDA link...\n");
       kfree(ap);
+      unlock_kernel();
       return err;
     }
 
···
   file->private_data = ap;
 
   DEXIT(FS_TRACE, " - ap=0x%p\n", ap);
+  unlock_kernel();
   return 0;
 }
 

sound/core/pcm_native.c

···
 #include <linux/mm.h>
 #include <linux/file.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/time.h>
 #include <linux/pm_qos_params.h>
 #include <linux/uio.h>
···
 	struct snd_pcm_file * pcm_file;
 	struct snd_pcm_substream *substream;
 	struct snd_pcm_runtime *runtime;
-	int err;
+	int err = -ENXIO;
 
+	lock_kernel();
 	pcm_file = file->private_data;
 	substream = pcm_file->substream;
-	snd_assert(substream != NULL, return -ENXIO);
+	snd_assert(substream != NULL, goto out);
 	runtime = substream->runtime;
 
 	err = fasync_helper(fd, file, on, &runtime->fasync);
+out:
+	unlock_kernel();
 	if (err < 0)
 		return err;
 	return 0;

sound/core/sound.c

···
 
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/time.h>
 #include <linux/device.h>
 #include <linux/moduleparam.h>
···
 
 EXPORT_SYMBOL(snd_lookup_minor_data);
 
-static int snd_open(struct inode *inode, struct file *file)
+static int __snd_open(struct inode *inode, struct file *file)
 {
 	unsigned int minor = iminor(inode);
 	struct snd_minor *mptr = NULL;
···
 	}
 	fops_put(old_fops);
 	return err;
+}
+
+
+/* BKL pushdown: nasty #ifdef avoidance wrapper */
+static int snd_open(struct inode *inode, struct file *file)
+{
+	int ret;
+
+	lock_kernel();
+	ret = __snd_open(inode, file);
+	unlock_kernel();
+	return ret;
 }
 
 static const struct file_operations snd_fops =

sound/sound_core.c

···
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/fs.h>
···
 	struct sound_unit *s;
 	const struct file_operations *new_fops = NULL;
 
+	lock_kernel ();
+
 	chain=unit&0x0F;
 	if(chain==4 || chain==5)	/* dsp/audio/dsp16 */
 	{
···
 			file->f_op = fops_get(old_fops);
 		}
 		fops_put(old_fops);
+		unlock_kernel();
 		return err;
 	}
 	spin_unlock(&sound_loader_lock);
+	unlock_kernel();
 	return -ENODEV;
 }