Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

drivers/atm/Kconfig

···
 menu "ATM drivers"
 	depends on NETDEVICES && ATM
 
+config ATM_DUMMY
+	tristate "Dummy ATM driver"
+	depends on ATM
+	help
+	  Dummy ATM driver. Useful for proxy signalling, testing,
+	  and development.  If unsure, say N.
+
 config ATM_TCP
 	tristate "ATM over TCP"
 	depends on INET && ATM

drivers/atm/Makefile

···
   obj-$(CONFIG_ATM_IDT77252)	+= suni.o
 endif
 
+obj-$(CONFIG_ATM_DUMMY)		+= adummy.o
 obj-$(CONFIG_ATM_TCP)		+= atmtcp.o
 obj-$(CONFIG_ATM_FIRESTREAM)	+= firestream.o
 obj-$(CONFIG_ATM_LANAI)		+= lanai.o

drivers/atm/adummy.c

···
+/*
+ * adummy.c: a dummy ATM driver
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/pci.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+#include <asm/uaccess.h>
+
+#include <linux/atmdev.h>
+#include <linux/atm.h>
+#include <linux/sonet.h>
+
+/* version definition */
+
+#define DRV_VERSION "1.0"
+
+#define DEV_LABEL "adummy"
+
+#define ADUMMY_DEV(dev) ((struct adummy_dev *) (dev)->dev_data)
+
+struct adummy_dev {
+	struct atm_dev *atm_dev;
+
+	struct list_head entry;
+};
+
+/* globals */
+
+static LIST_HEAD(adummy_devs);
+
+static int __init
+adummy_start(struct atm_dev *dev)
+{
+	dev->ci_range.vpi_bits = 4;
+	dev->ci_range.vci_bits = 12;
+
+	return 0;
+}
+
+static int
+adummy_open(struct atm_vcc *vcc)
+{
+	short vpi = vcc->vpi;
+	int vci = vcc->vci;
+
+	if (vci == ATM_VCI_UNSPEC || vpi == ATM_VPI_UNSPEC)
+		return 0;
+
+	set_bit(ATM_VF_ADDR, &vcc->flags);
+	set_bit(ATM_VF_READY, &vcc->flags);
+
+	return 0;
+}
+
+static void
+adummy_close(struct atm_vcc *vcc)
+{
+	clear_bit(ATM_VF_READY, &vcc->flags);
+	clear_bit(ATM_VF_ADDR, &vcc->flags);
+}
+
+static int
+adummy_send(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+	if (vcc->pop)
+		vcc->pop(vcc, skb);
+	else
+		dev_kfree_skb_any(skb);
+	atomic_inc(&vcc->stats->tx);
+
+	return 0;
+}
+
+static int
+adummy_proc_read(struct atm_dev *dev, loff_t *pos, char *page)
+{
+	int left = *pos;
+
+	if (!left--)
+		return sprintf(page, "version %s\n", DRV_VERSION);
+
+	return 0;
+}
+
+static struct atmdev_ops adummy_ops =
+{
+	.open =		adummy_open,
+	.close =	adummy_close,	
+	.send =		adummy_send,
+	.proc_read =	adummy_proc_read,
+	.owner =	THIS_MODULE
+};
+
+static int __init adummy_init(void)
+{
+	struct atm_dev *atm_dev;
+	struct adummy_dev *adummy_dev;
+	int err = 0;
+
+	printk(KERN_ERR "adummy: version %s\n", DRV_VERSION);
+
+	adummy_dev = (struct adummy_dev *) kmalloc(sizeof(struct adummy_dev),
+						   GFP_KERNEL);
+	if (!adummy_dev) {
+		printk(KERN_ERR DEV_LABEL ": kmalloc() failed\n");
+		err = -ENOMEM;
+		goto out;
+	}
+	memset(adummy_dev, 0, sizeof(struct adummy_dev));
+
+	atm_dev = atm_dev_register(DEV_LABEL, &adummy_ops, -1, 0);
+	if (!atm_dev) {
+		printk(KERN_ERR DEV_LABEL ": atm_dev_register() failed\n");
+		err = -ENODEV;
+		goto out_kfree;
+	}
+
+	adummy_dev->atm_dev = atm_dev;
+	atm_dev->dev_data = adummy_dev;
+
+	if (adummy_start(atm_dev)) {
+		printk(KERN_ERR DEV_LABEL ": adummy_start() failed\n");
+		err = -ENODEV;
+		goto out_unregister;
+	}
+
+	list_add(&adummy_dev->entry, &adummy_devs);
+out:
+	return err;
+
+out_unregister:
+	atm_dev_deregister(atm_dev);
+out_kfree:
+	kfree(adummy_dev);
+	goto out;
+}
+
+static void __exit adummy_cleanup(void)
+{
+	struct adummy_dev *adummy_dev, *next;
+
+	list_for_each_entry_safe(adummy_dev, next, &adummy_devs, entry) {
+		atm_dev_deregister(adummy_dev->atm_dev);
+		kfree(adummy_dev);
+	}
+}
+
+module_init(adummy_init);
+module_exit(adummy_cleanup);
+
+MODULE_AUTHOR("chas williams <[e-mail]>");
+MODULE_DESCRIPTION("dummy ATM driver");
+MODULE_LICENSE("GPL");

drivers/atm/atmdev_init.c

···
-/* drivers/atm/atmdev_init.c - ATM device driver initialization */
- 
-/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
- 
-
-#include <linux/config.h>
-#include <linux/init.h>
-
-
-#ifdef CONFIG_ATM_ZATM
-extern int zatm_detect(void);
-#endif
-#ifdef CONFIG_ATM_AMBASSADOR
-extern int amb_detect(void);
-#endif
-#ifdef CONFIG_ATM_HORIZON
-extern int hrz_detect(void);
-#endif
-#ifdef CONFIG_ATM_FORE200E
-extern int fore200e_detect(void);
-#endif
-#ifdef CONFIG_ATM_LANAI
-extern int lanai_detect(void);
-#endif
-
-
-/*
- * For historical reasons, atmdev_init returns the number of devices found.
- * Note that some detections may not go via atmdev_init (e.g. eni.c), so this
- * number is meaningless.
- */
-
-int __init atmdev_init(void)
-{
-	int devs;
-
-	devs = 0;
-#ifdef CONFIG_ATM_ZATM
-	devs += zatm_detect();
-#endif
-#ifdef CONFIG_ATM_AMBASSADOR
-	devs += amb_detect();
-#endif
-#ifdef CONFIG_ATM_HORIZON
-	devs += hrz_detect();
-#endif
-#ifdef CONFIG_ATM_FORE200E
-	devs += fore200e_detect();
-#endif
-#ifdef CONFIG_ATM_LANAI
-	devs += lanai_detect();
-#endif
-	return devs;
-}

drivers/atm/atmtcp.c

···
 {
 	struct atm_dev *atmtcp_dev;
 	struct atmtcp_dev_data *dev_data;
-	struct sock *s;
-	struct hlist_node *node;
-	struct atm_vcc *walk;
-	int i;
 
 	atmtcp_dev = (struct atm_dev *) vcc->dev_data;
 	dev_data = PRIV(atmtcp_dev);
···
 	if (dev_data->persist) return;
 	atmtcp_dev->dev_data = NULL;
 	kfree(dev_data);
-	shutdown_atm_dev(atmtcp_dev);
+	atm_dev_deregister(atmtcp_dev);
 	vcc->dev_data = NULL;
-	read_lock(&vcc_sklist_lock);
-	for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
-		struct hlist_head *head = &vcc_hash[i];
-
-		sk_for_each(s, node, head) {
-			walk = atm_sk(s);
-			if (walk->dev != atmtcp_dev)
-				continue;
-			wake_up(s->sk_sleep);
-		}
-	}
-	read_unlock(&vcc_sklist_lock);
 	module_put(THIS_MODULE);
 }
 
···
 	if (PRIV(dev)->vcc) return 0;
 	kfree(dev_data);
 	atm_dev_put(dev);
-	shutdown_atm_dev(dev);
+	atm_dev_deregister(dev);
 	return 0;
 }
 

drivers/atm/lanai.c

···
  * o  lanai_change_qos() isn't written yet
  *
  * o  There aren't any ioctl's yet -- I'd like to eventually support
- *    setting loopback and LED modes that way.  (see lanai_ioctl)
+ *    setting loopback and LED modes that way.
  *
  * o  If the segmentation engine or DMA gets shut down we should restart
  *    card as per section 17.0i.  (see lanai_reset)
···
  * vci with their bit set
  */
 static void vci_bitfield_iterate(struct lanai_dev *lanai,
-	/*const*/ unsigned long *lp,
+	const unsigned long *lp,
 	void (*func)(struct lanai_dev *,vci_t vci))
 {
 	vci_t vci = find_first_bit(lp, NUM_VCI);
···
 /* read a big-endian 4-byte value out of eeprom */
 static inline u32 eeprom_be4(const struct lanai_dev *lanai, int address)
 {
-	return be32_to_cpup((u32 *) (&lanai->eeprom[address]));
+	return be32_to_cpup((const u32 *) &lanai->eeprom[address]);
 }
 
 /* Checksum/validate EEPROM contents */
···
 }
 
 /* test if VCC is currently backlogged */
-static inline int vcc_is_backlogged(/*const*/ struct lanai_vcc *lvcc)
+static inline int vcc_is_backlogged(const struct lanai_vcc *lvcc)
 {
 	return !skb_queue_empty(&lvcc->tx.backlog);
 }
···
 {
 	int size;
 	struct sk_buff *skb;
-	/*const*/ u32 *x, *end = &lvcc->rx.buf.start[endptr * 4];
+	const u32 *x;
+	u32 *end = &lvcc->rx.buf.start[endptr * 4];
 	int n = ((unsigned long) end) - ((unsigned long) lvcc->rx.buf.ptr);
 	if (n < 0)
 		n += lanai_buf_size(&lvcc->rx.buf);
···
  * shifted by that much as we compute
  *
  */
-static int pcr_to_cbricg(/*const*/ struct atm_qos *qos)
+static int pcr_to_cbricg(const struct atm_qos *qos)
 {
 	int rounddown = 0;	/* 1 = Round PCR down, i.e. round ICG _up_ */
 	int x, icg, pcr = atm_pcr_goal(&qos->txtp);
···
 	return result;
 }
 
-#if 0
-/* ioctl operations for card */
-/* NOTE: these are all DEBUGGING ONLY currently */
-static int lanai_ioctl(struct atm_dev *atmdev, unsigned int cmd, void __user *arg)
-{
-	int result = 0;
-	struct lanai_dev *lanai = (struct lanai_dev *) atmdev->dev_data;
-	switch(cmd) {
-		case 2106275:
-			shutdown_atm_dev(atmdev);
-			return 0;
-		case 2200000: {
-			unsigned long flags;
-			spin_lock_irqsave(&lanai->servicelock, flags);
-			run_service(lanai);
-			spin_unlock_irqrestore(&lanai->servicelock, flags);
-			return 0; }
-		case 2200002:
-			get_statistics(lanai);
-			return 0;
-		case 2200003: {
-			unsigned int i;
-			for (i = 0; i <= 0x5C ; i += 4) {
-				if (i==0x48) /* Write-only butt reg */
-					continue;
-				printk(KERN_CRIT DEV_LABEL "  0x%02X: "
-				    "0x%08X\n", i,
-				    (unsigned int) readl(lanai->base + i));
-				barrier(); mb();
-				pcistatus_check(lanai, 0);
-				barrier(); mb();
-			}
-			return 0; }
-		case 2200004: {
-			u8 b;
-			u16 w;
-			u32 dw;
-			struct pci_dev *pci = lanai->pci;
-			(void) pci_read_config_word(pci, PCI_VENDOR_ID, &w);
-			DPRINTK("vendor = 0x%X\n", (unsigned int) w);
-			(void) pci_read_config_word(pci, PCI_DEVICE_ID, &w);
-			DPRINTK("device = 0x%X\n", (unsigned int) w);
-			(void) pci_read_config_word(pci, PCI_COMMAND, &w);
-			DPRINTK("command = 0x%X\n", (unsigned int) w);
-			(void) pci_read_config_word(pci, PCI_STATUS, &w);
-			DPRINTK("status = 0x%X\n", (unsigned int) w);
-			(void) pci_read_config_dword(pci,
-			    PCI_CLASS_REVISION, &dw);
-			DPRINTK("class/revision = 0x%X\n", (unsigned int) dw);
-			(void) pci_read_config_byte(pci,
-			    PCI_CACHE_LINE_SIZE, &b);
-			DPRINTK("cache line size = 0x%X\n", (unsigned int) b);
-			(void) pci_read_config_byte(pci, PCI_LATENCY_TIMER, &b);
-			DPRINTK("latency = %d (0x%X)\n",
-			    (int) b, (unsigned int) b);
-			(void) pci_read_config_byte(pci, PCI_HEADER_TYPE, &b);
-			DPRINTK("header type = 0x%X\n", (unsigned int) b);
-			(void) pci_read_config_byte(pci, PCI_BIST, &b);
-			DPRINTK("bist = 0x%X\n", (unsigned int) b);
-			/* skipping a few here */
-			(void) pci_read_config_byte(pci,
-			    PCI_INTERRUPT_LINE, &b);
-			DPRINTK("pci_int_line = 0x%X\n", (unsigned int) b);
-			(void) pci_read_config_byte(pci,
-			    PCI_INTERRUPT_PIN, &b);
-			DPRINTK("pci_int_pin = 0x%X\n", (unsigned int) b);
-			(void) pci_read_config_byte(pci, PCI_MIN_GNT, &b);
-			DPRINTK("min_gnt = 0x%X\n", (unsigned int) b);
-			(void) pci_read_config_byte(pci, PCI_MAX_LAT, &b);
-			DPRINTK("max_lat = 0x%X\n", (unsigned int) b); }
-			return 0;
-#ifdef USE_POWERDOWN
-		case 2200005:
-			DPRINTK("Coming out of powerdown\n");
-			lanai->conf1 &= ~CONFIG1_POWERDOWN;
-			conf1_write(lanai);
-			return 0;
-#endif
-		default:
-			result = -ENOIOCTLCMD;
-	}
-	return result;
-}
-#else /* !0 */
-#define lanai_ioctl NULL
-#endif /* 0 */
-
 static int lanai_send(struct atm_vcc *atmvcc, struct sk_buff *skb)
 {
 	struct lanai_vcc *lvcc = (struct lanai_vcc *) atmvcc->dev_data;
···
 	.dev_close	= lanai_dev_close,
 	.open		= lanai_open,
 	.close		= lanai_close,
-	.ioctl		= lanai_ioctl,
 	.getsockopt	= NULL,
 	.setsockopt	= NULL,
 	.send		= lanai_send,
···
 	 * gone, so there isn't much to do
 	 */
 	DPRINTK("cleanup_module()\n");
+	pci_unregister_driver(&lanai_driver);
 }
 
 module_init(lanai_module_init);

drivers/usb/atm/usbatm.c

···
 
  fail:
 	instance->atm_dev = NULL;
-	shutdown_atm_dev(atm_dev); /* usbatm_atm_dev_close will eventually be called */
+	atm_dev_deregister(atm_dev); /* usbatm_atm_dev_close will eventually be called */
 	return ret;
 }
 
···
 
 	/* ATM finalize */
 	if (instance->atm_dev)
-		shutdown_atm_dev(instance->atm_dev);
+		atm_dev_deregister(instance->atm_dev);
 
 	usbatm_put_instance(instance);	/* taken in usbatm_usb_probe */
 }

include/linux/atmdev.h

···
 #define LINUX_ATMDEV_H
 
 
-#include <linux/config.h>
 #include <linux/atmapi.h>
 #include <linux/atm.h>
 #include <linux/atmioc.h>
···
 
 #ifdef __KERNEL__
 
+#include <linux/config.h>
 #include <linux/wait.h> /* wait_queue_head_t */
 #include <linux/time.h> /* struct timeval */
 #include <linux/net.h>
···
 
 
 enum {
-	ATM_DF_CLOSE,		/* close device when last VCC is closed */
+	ATM_DF_REMOVED,		/* device was removed from atm_devs list */
 };
 
 
···
     int number,unsigned long *flags); /* number == -1: pick first available */
 struct atm_dev *atm_dev_lookup(int number);
 void atm_dev_deregister(struct atm_dev *dev);
-void shutdown_atm_dev(struct atm_dev *dev);
 void vcc_insert_socket(struct sock *sk);
 
 
···
 
 static inline void atm_dev_put(struct atm_dev *dev)
 {
-	atomic_dec(&dev->refcnt);
-
-	if ((atomic_read(&dev->refcnt) == 1) &&
-	    test_bit(ATM_DF_CLOSE,&dev->flags))
-		shutdown_atm_dev(dev);
+	if (atomic_dec_and_test(&dev->refcnt)) {
+		BUG_ON(!test_bit(ATM_DF_REMOVED, &dev->flags));
+		if (dev->ops->dev_close)
+			dev->ops->dev_close(dev);
+		kfree(dev);
+	}
 }
 
 
 int atm_charge(struct atm_vcc *vcc,int truesize);
 struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
     gfp_t gfp_flags);
-int atm_pcr_goal(struct atm_trafprm *tp);
+int atm_pcr_goal(const struct atm_trafprm *tp);
 
 void vcc_release_async(struct atm_vcc *vcc, int reply);
 

net/atm/atm_misc.c

···
  */
 
 
-int atm_pcr_goal(struct atm_trafprm *tp)
+int atm_pcr_goal(const struct atm_trafprm *tp)
 {
-	if (tp->pcr && tp->pcr != ATM_MAX_PCR) return -tp->pcr;
-	if (tp->min_pcr && !tp->pcr) return tp->min_pcr;
-	if (tp->max_pcr != ATM_MAX_PCR) return -tp->max_pcr;
+	if (tp->pcr && tp->pcr != ATM_MAX_PCR)
+		return -tp->pcr;
+	if (tp->min_pcr && !tp->pcr)
+		return tp->min_pcr;
+	if (tp->max_pcr != ATM_MAX_PCR)
+		return -tp->max_pcr;
 	return 0;
 }
 

net/atm/common.c

···
 EXPORT_SYMBOL(vcc_release_async);
 
 
+void atm_dev_release_vccs(struct atm_dev *dev)
+{
+	int i;
+
+	write_lock_irq(&vcc_sklist_lock);
+	for (i = 0; i < VCC_HTABLE_SIZE; i++) {
+		struct hlist_head *head = &vcc_hash[i];
+		struct hlist_node *node, *tmp;
+		struct sock *s;
+		struct atm_vcc *vcc;
+
+		sk_for_each_safe(s, node, tmp, head) {
+			vcc = atm_sk(s);
+			if (vcc->dev == dev) {
+				vcc_release_async(vcc, -EPIPE);
+				sk_del_node_init(s);
+			}
+		}
+	}
+	write_unlock_irq(&vcc_sklist_lock);
+}
+
+
 static int adjust_tp(struct atm_trafprm *tp,unsigned char aal)
 {
 	int max_sdu;
···
 		return -EINVAL;
 	if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE))
 		return -EPERM;
-	error = 0;
+	error = -ENODEV;
 	if (!try_module_get(dev->ops->owner))
-		return -ENODEV;
+		return error;
 	vcc->dev = dev;
 	write_lock_irq(&vcc_sklist_lock);
-	if ((error = find_ci(vcc, &vpi, &vci))) {
+	if (test_bit(ATM_DF_REMOVED, &dev->flags) || 
+	    (error = find_ci(vcc, &vpi, &vci))) {
 		write_unlock_irq(&vcc_sklist_lock);
 		goto fail_module_put;
 	}
···
 	if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
 	    vcc->qos.rxtp.traffic_class == ATM_ANYCLASS)
 		return -EINVAL;
-	if (itf != ATM_ITF_ANY) {
-		dev = atm_dev_lookup(itf);
-		if (!dev)
-			return -ENODEV;
-		error = __vcc_connect(vcc, dev, vpi, vci);
-		if (error) {
-			atm_dev_put(dev);
-			return error;
-		}
+	if (likely(itf != ATM_ITF_ANY)) {
+		dev = try_then_request_module(atm_dev_lookup(itf), "atm-device-%d", itf);
 	} else {
-		struct list_head *p, *next;
-
 		dev = NULL;
-		spin_lock(&atm_dev_lock);
-		list_for_each_safe(p, next, &atm_devs) {
-			dev = list_entry(p, struct atm_dev, dev_list);
+		down(&atm_dev_mutex);
+		if (!list_empty(&atm_devs)) {
+			dev = list_entry(atm_devs.next, struct atm_dev, dev_list);
 			atm_dev_hold(dev);
-			spin_unlock(&atm_dev_lock);
-			if (!__vcc_connect(vcc, dev, vpi, vci))
-				break;
-			atm_dev_put(dev);
-			dev = NULL;
-			spin_lock(&atm_dev_lock);
 		}
-		spin_unlock(&atm_dev_lock);
-		if (!dev)
-			return -ENODEV;
+		up(&atm_dev_mutex);
+	}
+	if (!dev)
+		return -ENODEV;
+	error = __vcc_connect(vcc, dev, vpi, vci);
+	if (error) {
+		atm_dev_put(dev);
+		return error;
 	}
 	if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
 		set_bit(ATM_VF_PARTIAL,&vcc->flags);

net/atm/common.h

···
 /* SVC */
 int svc_change_qos(struct atm_vcc *vcc,struct atm_qos *qos);
 
+void atm_dev_release_vccs(struct atm_dev *dev);
+
 #endif

net/atm/resources.c

···
 
 
 LIST_HEAD(atm_devs);
-DEFINE_SPINLOCK(atm_dev_lock);
+DECLARE_MUTEX(atm_dev_mutex);
 
 static struct atm_dev *__alloc_atm_dev(const char *type)
 {
···
 
 	list_for_each(p, &atm_devs) {
 		dev = list_entry(p, struct atm_dev, dev_list);
-		if ((dev->ops) && (dev->number == number)) {
+		if (dev->number == number) {
 			atm_dev_hold(dev);
 			return dev;
 		}
···
 {
 	struct atm_dev *dev;
 
-	spin_lock(&atm_dev_lock);
+	down(&atm_dev_mutex);
 	dev = __atm_dev_lookup(number);
-	spin_unlock(&atm_dev_lock);
+	up(&atm_dev_mutex);
 	return dev;
 }
+
 
 struct atm_dev *atm_dev_register(const char *type, const struct atmdev_ops *ops,
 				 int number, unsigned long *flags)
···
 		    type);
 		return NULL;
 	}
-	spin_lock(&atm_dev_lock);
+	down(&atm_dev_mutex);
 	if (number != -1) {
 		if ((inuse = __atm_dev_lookup(number))) {
 			atm_dev_put(inuse);
-			spin_unlock(&atm_dev_lock);
+			up(&atm_dev_mutex);
 			kfree(dev);
 			return NULL;
 		}
···
 		memset(&dev->flags, 0, sizeof(dev->flags));
 	memset(&dev->stats, 0, sizeof(dev->stats));
 	atomic_set(&dev->refcnt, 1);
-	list_add_tail(&dev->dev_list, &atm_devs);
-	spin_unlock(&atm_dev_lock);
 
 	if (atm_proc_dev_register(dev) < 0) {
 		printk(KERN_ERR "atm_dev_register: "
 		       "atm_proc_dev_register failed for dev %s\n",
 		       type);
-		spin_lock(&atm_dev_lock);
-		list_del(&dev->dev_list);
-		spin_unlock(&atm_dev_lock);
+		up(&atm_dev_mutex);
 		kfree(dev);
 		return NULL;
 	}
+	list_add_tail(&dev->dev_list, &atm_devs);
+	up(&atm_dev_mutex);
 
 	return dev;
 }
···
 
 void atm_dev_deregister(struct atm_dev *dev)
 {
-	unsigned long warning_time;
+	BUG_ON(test_bit(ATM_DF_REMOVED, &dev->flags));
+	set_bit(ATM_DF_REMOVED, &dev->flags);
 
+	/*
+	 * if we remove current device from atm_devs list, new device 
+	 * with same number can appear, such we need deregister proc, 
+	 * release async all vccs and remove them from vccs list too
+	 */
+	down(&atm_dev_mutex);
+	list_del(&dev->dev_list);
+	up(&atm_dev_mutex);
+
+	atm_dev_release_vccs(dev);
 	atm_proc_dev_deregister(dev);
 
-	spin_lock(&atm_dev_lock);
-	list_del(&dev->dev_list);
-	spin_unlock(&atm_dev_lock);
-
-        warning_time = jiffies;
-        while (atomic_read(&dev->refcnt) != 1) {
-                msleep(250);
-                if ((jiffies - warning_time) > 10 * HZ) {
-                        printk(KERN_EMERG "atm_dev_deregister: waiting for "
-                               "dev %d to become free. Usage count = %d\n",
-                               dev->number, atomic_read(&dev->refcnt));
-                        warning_time = jiffies;
-                }
-        }
-
-	kfree(dev);
-}
-
-void shutdown_atm_dev(struct atm_dev *dev)
-{
-	if (atomic_read(&dev->refcnt) > 1) {
-		set_bit(ATM_DF_CLOSE, &dev->flags);
-		return;
-	}
-	if (dev->ops->dev_close)
-		dev->ops->dev_close(dev);
-	atm_dev_deregister(dev);
+	atm_dev_put(dev);
 }
 
 
···
 				return -EFAULT;
 			if (get_user(len, &iobuf->length))
 				return -EFAULT;
-			spin_lock(&atm_dev_lock);
+			down(&atm_dev_mutex);
 			list_for_each(p, &atm_devs)
 				size += sizeof(int);
 			if (size > len) {
-				spin_unlock(&atm_dev_lock);
+				up(&atm_dev_mutex);
 				return -E2BIG;
 			}
 			tmp_buf = kmalloc(size, GFP_ATOMIC);
 			if (!tmp_buf) {
-				spin_unlock(&atm_dev_lock);
+				up(&atm_dev_mutex);
 				return -ENOMEM;
 			}
 			tmp_p = tmp_buf;
···
 				dev = list_entry(p, struct atm_dev, dev_list);
 				*tmp_p++ = dev->number;
 			}
-			spin_unlock(&atm_dev_lock);
+			up(&atm_dev_mutex);
 		        error = ((copy_to_user(buf, tmp_buf, size)) ||
 					put_user(size, &iobuf->length))
 						? -EFAULT : 0;
···
 	if (get_user(number, &sioc->number))
 		return -EFAULT;
 
-	if (!(dev = atm_dev_lookup(number)))
+	if (!(dev = try_then_request_module(atm_dev_lookup(number),
+					    "atm-device-%d", number)))
 		return -ENODEV;
 	
 	switch (cmd) {
···
 
 void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos)
 {
- 	spin_lock(&atm_dev_lock);
+ 	down(&atm_dev_mutex);
 	return *pos ? dev_get_idx(*pos) : (void *) 1;
 }
 
 void atm_dev_seq_stop(struct seq_file *seq, void *v)
 {
- 	spin_unlock(&atm_dev_lock);
+ 	up(&atm_dev_mutex);
 }
  
 void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
···
 EXPORT_SYMBOL(atm_dev_register);
 EXPORT_SYMBOL(atm_dev_deregister);
 EXPORT_SYMBOL(atm_dev_lookup);
-EXPORT_SYMBOL(shutdown_atm_dev);

net/atm/resources.h

···
 
 
 extern struct list_head atm_devs;
-extern spinlock_t atm_dev_lock;
-
+extern struct semaphore atm_dev_mutex;
 
 int atm_dev_ioctl(unsigned int cmd, void __user *arg);
 

net/ipv4/fib_hash.c

···
 
 static unsigned fib_flag_trans(int type, u32 mask, struct fib_info *fi)
 {
-	static unsigned type2flags[RTN_MAX + 1] = {
+	static const unsigned type2flags[RTN_MAX + 1] = {
 		[7] = RTF_REJECT, [8] = RTF_REJECT,
 	};
 	unsigned flags = type2flags[type];

net/ipv4/fib_semantics.c

···
 #define endfor_nexthops(fi) }
 
 
-static struct 
+static const struct 
 {
 	int	error;
 	u8	scope;

net/ipv4/icmp.c

···
 	short   error;		/* This ICMP is classed as an error message */
 };
 
-static struct icmp_control icmp_pointers[NR_ICMP_TYPES+1];
+static const struct icmp_control icmp_pointers[NR_ICMP_TYPES+1];
 
 /*
  *	The ICMP socket(s). This is the most convenient way to flow control
···
 /*
  *	This table is the definition of how we handle ICMP.
  */
-static struct icmp_control icmp_pointers[NR_ICMP_TYPES + 1] = {
+static const struct icmp_control icmp_pointers[NR_ICMP_TYPES + 1] = {
 	[ICMP_ECHOREPLY] = {
 		.output_entry = ICMP_MIB_OUTECHOREPS,
 		.input_entry = ICMP_MIB_INECHOREPS,

net/ipv4/ip_gre.c

···
 	return 0;
 }
 
-int __init ipgre_fb_tunnel_init(struct net_device *dev)
+static int __init ipgre_fb_tunnel_init(struct net_device *dev)
 {
 	struct ip_tunnel *tunnel = (struct ip_tunnel*)dev->priv;
 	struct iphdr *iph = &tunnel->parms.iph;

net/ipv4/ip_output.c

···
 	return csum;
 }
 
-inline int ip_ufo_append_data(struct sock *sk,
+static inline int ip_ufo_append_data(struct sock *sk,
 			int getfrag(void *from, char *to, int offset, int len,
 			       int odd, struct sk_buff *skb),
 			void *from, int length, int hh_len, int fragheaderlen,

net/ipv4/ipvs/ip_vs_conn.c

···
 	 * The drop rate array needs tuning for real environments.
 	 * Called from timer bh only => no locking
 	 */
-	static char todrop_rate[9] = {0, 1, 2, 3, 4, 5, 6, 7, 8};
+	static const char todrop_rate[9] = {0, 1, 2, 3, 4, 5, 6, 7, 8};
 	static char todrop_counter[9] = {0};
 	int i;
 

net/ipv4/ipvs/ip_vs_ctl.c

···
 #define DAEMON_ARG_LEN		(sizeof(struct ip_vs_daemon_user))
 #define MAX_ARG_LEN		SVCDEST_ARG_LEN
 
-static unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
+static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
 	[SET_CMDID(IP_VS_SO_SET_ADD)]		= SERVICE_ARG_LEN,
 	[SET_CMDID(IP_VS_SO_SET_EDIT)]		= SERVICE_ARG_LEN,
 	[SET_CMDID(IP_VS_SO_SET_DEL)]		= SERVICE_ARG_LEN,
···
 #define GET_TIMEOUT_ARG_LEN	(sizeof(struct ip_vs_timeout_user))
 #define GET_DAEMON_ARG_LEN	(sizeof(struct ip_vs_daemon_user) * 2)
 
-static unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
+static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
 	[GET_CMDID(IP_VS_SO_GET_VERSION)]	= 64,
 	[GET_CMDID(IP_VS_SO_GET_INFO)]		= GET_INFO_ARG_LEN,
 	[GET_CMDID(IP_VS_SO_GET_SERVICES)]	= GET_SERVICES_ARG_LEN,

net/ipv4/ipvs/ip_vs_proto_tcp.c

···
 #define TCP_DIR_OUTPUT		4
 #define TCP_DIR_INPUT_ONLY	8
 
-static int tcp_state_off[IP_VS_DIR_LAST] = {
+static const int tcp_state_off[IP_VS_DIR_LAST] = {
 	[IP_VS_DIR_INPUT]		=	TCP_DIR_INPUT,
 	[IP_VS_DIR_OUTPUT]		=	TCP_DIR_OUTPUT,
 	[IP_VS_DIR_INPUT_ONLY]		=	TCP_DIR_INPUT_ONLY,

net/ipv4/netfilter/ip_conntrack_amanda.c

···
 module_param(master_timeout, int, 0600);
 MODULE_PARM_DESC(master_timeout, "timeout for the master connection");
 
-static char *conns[] = { "DATA ", "MESG ", "INDEX " };
+static const char *conns[] = { "DATA ", "MESG ", "INDEX " };
 
 /* This is slow, but it's simple. --RR */
 static char *amanda_buffer;

net/ipv4/netfilter/ip_conntrack_core.c

···
 			   get_order(sizeof(struct list_head) * size));
 }
 
-void ip_conntrack_flush()
+void ip_conntrack_flush(void)
 {
 	/* This makes sure all current packets have passed through
            netfilter framework.  Roll on, two-stage module
···
 	return hash;
 }
 
-int set_hashsize(const char *val, struct kernel_param *kp)
+static int set_hashsize(const char *val, struct kernel_param *kp)
 {
 	int i, bucket, hashsize, vmalloced;
 	int old_vmalloced, old_size;

net/ipv4/netfilter/ip_conntrack_ftp.c

···
 static int try_eprt(const char *, size_t, u_int32_t [], char);
 static int try_epsv_response(const char *, size_t, u_int32_t [], char);
 
-static struct ftp_search {
+static const struct ftp_search {
 	enum ip_conntrack_dir dir;
 	const char *pattern;
 	size_t plen;

net/ipv4/netfilter/ip_conntrack_irc.c

···
 module_param(dcc_timeout, int, 0400);
 MODULE_PARM_DESC(dcc_timeout, "timeout on for unestablished DCC channels");
 
-static char *dccprotos[] = { "SEND ", "CHAT ", "MOVE ", "TSEND ", "SCHAT " };
+static const char *dccprotos[] = { "SEND ", "CHAT ", "MOVE ", "TSEND ", "SCHAT " };
 #define MINMATCHLEN	5
 
 #if 0

net/ipv4/netfilter/ip_conntrack_proto_icmp.c

···
 			     const struct ip_conntrack_tuple *orig)
 {
 	/* Add 1; spaces filled with 0. */
-	static u_int8_t invmap[]
+	static const u_int8_t invmap[]
 		= { [ICMP_ECHO] = ICMP_ECHOREPLY + 1,
 		    [ICMP_ECHOREPLY] = ICMP_ECHO + 1,
 		    [ICMP_TIMESTAMP] = ICMP_TIMESTAMPREPLY + 1,
···
 	return NF_ACCEPT;
 }
 
-static u_int8_t valid_new[] = { 
+static const u_int8_t valid_new[] = { 
 	[ICMP_ECHO] = 1,
 	[ICMP_TIMESTAMP] = 1,
 	[ICMP_INFO_REQUEST] = 1,

net/ipv4/netfilter/ip_conntrack_proto_sctp.c

···
 static unsigned long ip_ct_sctp_timeout_shutdown_recd     = 300 SECS / 1000;
 static unsigned long ip_ct_sctp_timeout_shutdown_ack_sent =   3 SECS;
 
-static unsigned long * sctp_timeouts[]
+static const unsigned long * sctp_timeouts[]
 = { NULL,                                  /* SCTP_CONNTRACK_NONE  */
     &ip_ct_sctp_timeout_closed,	           /* SCTP_CONNTRACK_CLOSED */
     &ip_ct_sctp_timeout_cookie_wait,       /* SCTP_CONNTRACK_COOKIE_WAIT */
···
 */
 
 /* SCTP conntrack state transitions */
-static enum sctp_conntrack sctp_conntracks[2][9][SCTP_CONNTRACK_MAX] = {
+static const enum sctp_conntrack sctp_conntracks[2][9][SCTP_CONNTRACK_MAX] = {
 	{
 /*	ORIGINAL	*/
 /*                  sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */

net/ipv4/netfilter/ip_conntrack_proto_tcp.c

···
    to ~13-30min depending on RTO. */
 unsigned long ip_ct_tcp_timeout_max_retrans =     5 MINS;
  
-static unsigned long * tcp_timeouts[]
+static const unsigned long * tcp_timeouts[]
 = { NULL,                              /*      TCP_CONNTRACK_NONE */
     &ip_ct_tcp_timeout_syn_sent,       /*      TCP_CONNTRACK_SYN_SENT, */
     &ip_ct_tcp_timeout_syn_recv,       /*      TCP_CONNTRACK_SYN_RECV, */
···
  *	if they are invalid
  *	or we do not support the request (simultaneous open)
  */
-static enum tcp_conntrack tcp_conntracks[2][6][TCP_CONNTRACK_MAX] = {
+static const enum tcp_conntrack tcp_conntracks[2][6][TCP_CONNTRACK_MAX] = {
 	{
 /* ORIGINAL */
 /* 	     sNO, sSS, sSR, sES, sFW, sCW, sLA, sTW, sCL, sLI	*/
···
 #define	TH_CWR	0x80
 
 /* table of valid flag combinations - ECE and CWR are always valid */
-static u8 tcp_valid_flags[(TH_FIN|TH_SYN|TH_RST|TH_PUSH|TH_ACK|TH_URG) + 1] =
+static const u8 tcp_valid_flags[(TH_FIN|TH_SYN|TH_RST|TH_PUSH|TH_ACK|TH_URG) + 1] =
 {
 	[TH_SYN]			= 1,
 	[TH_SYN|TH_ACK]			= 1,

net/ipv4/netfilter/ip_nat_core.c

···
 static struct list_head *bysource;
 
 #define MAX_IP_NAT_PROTO 256
-struct ip_nat_protocol *ip_nat_protos[MAX_IP_NAT_PROTO];
+static struct ip_nat_protocol *ip_nat_protos[MAX_IP_NAT_PROTO];
 
 static inline struct ip_nat_protocol *
 __ip_nat_proto_find(u_int8_t protonum)

net/ipv4/netfilter/ip_tables.c

···
 	return pos;
 }
 
-static struct { char *name; get_info_t *get_info; } ipt_proc_entry[] =
+static const struct { char *name; get_info_t *get_info; } ipt_proc_entry[] =
 { { "ip_tables_names", ipt_get_tables },
   { "ip_tables_targets", ipt_get_targets },
   { "ip_tables_matches", ipt_get_matches },

net/ipv4/netfilter/ipt_LOG.c

···
 	}
 	case IPPROTO_ICMP: {
 		struct icmphdr _icmph, *ich;
-		static size_t required_len[NR_ICMP_TYPES+1]
+		static const size_t required_len[NR_ICMP_TYPES+1]
 			= { [ICMP_ECHOREPLY] = 4,
 			    [ICMP_DEST_UNREACH]
 			    = 8 + sizeof(struct iphdr),
···
 	/* maxlen = 230+   91  + 230 + 252 = 803 */
 }
 
-struct nf_loginfo default_loginfo = {
+static struct nf_loginfo default_loginfo = {
 	.type	= NF_LOG_TYPE_LOG,
 	.u = {
 		.log = {

net/ipv4/proc.c

···
 }
 
 /* snmp items */
-static struct snmp_mib snmp4_ipstats_list[] = {
+static const struct snmp_mib snmp4_ipstats_list[] = {
 	SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
 	SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
 	SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
···
 	SNMP_MIB_SENTINEL
 };
 
-static struct snmp_mib snmp4_icmp_list[] = {
+static const struct snmp_mib snmp4_icmp_list[] = {
 	SNMP_MIB_ITEM("InMsgs", ICMP_MIB_INMSGS),
 	SNMP_MIB_ITEM("InErrors", ICMP_MIB_INERRORS),
 	SNMP_MIB_ITEM("InDestUnreachs", ICMP_MIB_INDESTUNREACHS),
···
 	SNMP_MIB_SENTINEL
 };
 
-static struct snmp_mib snmp4_tcp_list[] = {
+static const struct snmp_mib snmp4_tcp_list[] = {
 	SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
 	SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
 	SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
···
 	SNMP_MIB_SENTINEL
 };
 
-static struct snmp_mib snmp4_udp_list[] = {
+static const struct snmp_mib snmp4_udp_list[] = {
 	SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
 	SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
 	SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
···
 	SNMP_MIB_SENTINEL
 };
 
-static struct snmp_mib snmp4_net_list[] = {
+static const struct snmp_mib snmp4_net_list[] = {
 	SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
 	SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
 	SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),

net/ipv4/route.c

···
  *	are needed for AMPRnet AX.25 paths.
  */
 
-static unsigned short mtu_plateau[] =
+static const unsigned short mtu_plateau[] =
 {32000, 17914, 8166, 4352, 2002, 1492, 576, 296, 216, 128 };
 
 static __inline__ unsigned short guess_mtu(unsigned short old_mtu)
···
 					sizeof(struct rt_hash_bucket),
 					rhash_entries,
 					(num_physpages >= 128 * 1024) ?
-						(27 - PAGE_SHIFT) :
-						(29 - PAGE_SHIFT),
+					15 : 17,
 					HASH_HIGHMEM,
 					&rt_hash_log,
 					&rt_hash_mask,

net/ipv4/tcp.c

···
  *	closed.
  */
 
-static unsigned char new_state[16] = {
+static const unsigned char new_state[16] = {
   /* current state:        new state:      action:	*/
   /* (Invalid)		*/ TCP_CLOSE,
   /* TCP_ESTABLISHED	*/ TCP_FIN_WAIT1 | TCP_ACTION_FIN,
···
 					sizeof(struct inet_ehash_bucket),
 					thash_entries,
 					(num_physpages >= 128 * 1024) ?
-						(25 - PAGE_SHIFT) :
-						(27 - PAGE_SHIFT),
+					13 : 15,
 					HASH_HIGHMEM,
 					&tcp_hashinfo.ehash_size,
 					NULL,
···
 					sizeof(struct inet_bind_hashbucket),
 					tcp_hashinfo.ehash_size,
 					(num_physpages >= 128 * 1024) ?
-						(25 - PAGE_SHIFT) :
-						(27 - PAGE_SHIFT),
+					13 : 15,
 					HASH_HIGHMEM,
 					&tcp_hashinfo.bhash_size,
 					NULL,

net/ipv6/icmp.c

···
 	inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
 }
 
-static struct icmp6_err {
+static const struct icmp6_err {
 	int err;
 	int fatal;
 } tab_unreach[] = {

net/ipv6/ip6_output.c

···
 	*dst = NULL;
 	return err;
 }
-inline int ip6_ufo_append_data(struct sock *sk,
+
+static inline int ip6_ufo_append_data(struct sock *sk,
 			int getfrag(void *from, char *to, int offset, int len,
 			int odd, struct sk_buff *skb),
 			void *from, int length, int hh_len, int fragheaderlen,

net/ipv6/ipv6_sockglue.c

···
 	return -EINVAL;
 }
 
-int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr,
-			   char __user *optval, int len)
+static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_opt_hdr *hdr,
+				  char __user *optval, int len)
 {
 	if (!hdr)
 		return 0;

net/ipv6/netfilter/ip6_tables.c

···
 	return pos;
 }
 
-static struct { char *name; get_info_t *get_info; } ip6t_proc_entry[] =
+static const struct { char *name; get_info_t *get_info; } ip6t_proc_entry[] =
 { { "ip6_tables_names", ip6t_get_tables },
   { "ip6_tables_targets", ip6t_get_targets },
   { "ip6_tables_matches", ip6t_get_matches },