Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched

* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
sched: do not hurt SCHED_BATCH on wakeup
sched: touch softlockup watchdog after idling
sched: sysctl, proc_dointvec_minmax() expects int values for
sched: mark rwsem functions as __sched for wchan/profiling
sched: fix crash on ia64, introduce task_current()

kernel/rwsem.c

···
 
 #include <linux/types.h>
 #include <linux/kernel.h>
+#include <linux/sched.h>
 #include <linux/module.h>
 #include <linux/rwsem.h>
 
···
 /*
  * lock for reading
  */
-void down_read(struct rw_semaphore *sem)
+void __sched down_read(struct rw_semaphore *sem)
 {
 	might_sleep();
 	rwsem_acquire_read(&sem->dep_map, 0, 0, _RET_IP_);
···
 /*
  * lock for writing
  */
-void down_write(struct rw_semaphore *sem)
+void __sched down_write(struct rw_semaphore *sem)
 {
 	might_sleep();
 	rwsem_acquire(&sem->dep_map, 0, 0, _RET_IP_);

kernel/sched.c

···
 # define finish_arch_switch(prev)	do { } while (0)
 #endif
 
+static inline int task_current(struct rq *rq, struct task_struct *p)
+{
+	return rq->curr == p;
+}
+
 #ifndef __ARCH_WANT_UNLOCKED_CTXSW
 static inline int task_running(struct rq *rq, struct task_struct *p)
 {
-	return rq->curr == p;
+	return task_current(rq, p);
 }
 
 static inline void prepare_lock_switch(struct rq *rq, struct task_struct *next)
···
 #ifdef CONFIG_SMP
 	return p->oncpu;
 #else
-	return rq->curr == p;
+	return task_current(rq, p);
 #endif
 }
 
···
 	struct rq *rq = cpu_rq(smp_processor_id());
 	u64 now = sched_clock();
 
+	touch_softlockup_watchdog();
 	rq->idle_clock += delta_ns;
 	/*
 	 * Override the previous timestamp and ignore all
···
 
 	rq = task_rq_lock(p, &flags);
 	ns = p->se.sum_exec_runtime;
-	if (rq->curr == p) {
+	if (task_current(rq, p)) {
 		update_rq_clock(rq);
 		delta_exec = rq->clock - p->se.exec_start;
 		if ((s64)delta_exec > 0)
···
 
 	oldprio = p->prio;
 	on_rq = p->se.on_rq;
-	running = task_running(rq, p);
+	running = task_current(rq, p);
 	if (on_rq) {
 		dequeue_task(rq, p, 0);
 		if (running)
···
 	}
 	update_rq_clock(rq);
 	on_rq = p->se.on_rq;
-	running = task_running(rq, p);
+	running = task_current(rq, p);
 	if (on_rq) {
 		deactivate_task(rq, p, 0);
 		if (running)
···
 
 	update_rq_clock(rq);
 
-	running = task_running(rq, tsk);
+	running = task_current(rq, tsk);
 	on_rq = tsk->se.on_rq;
 
 	if (on_rq) {

kernel/sched_fair.c

···
 
 	if (!initial) {
 		/* sleeps upto a single latency don't count. */
-		if (sched_feat(NEW_FAIR_SLEEPERS) && entity_is_task(se) &&
-				task_of(se)->policy != SCHED_BATCH)
+		if (sched_feat(NEW_FAIR_SLEEPERS) && entity_is_task(se))
 			vruntime -= sysctl_sched_latency;
 
 		/* ensure we never gain time by being placed backwards. */

kernel/sysctl.c

···
 };
 
 #ifdef CONFIG_SCHED_DEBUG
-static unsigned long min_sched_granularity_ns = 100000;		/* 100 usecs */
-static unsigned long max_sched_granularity_ns = NSEC_PER_SEC;	/* 1 second */
-static unsigned long min_wakeup_granularity_ns;			/* 0 usecs */
-static unsigned long max_wakeup_granularity_ns = NSEC_PER_SEC;	/* 1 second */
+static int min_sched_granularity_ns = 100000;		/* 100 usecs */
+static int max_sched_granularity_ns = NSEC_PER_SEC;	/* 1 second */
+static int min_wakeup_granularity_ns;			/* 0 usecs */
+static int max_wakeup_granularity_ns = NSEC_PER_SEC;	/* 1 second */
 #endif
 
 static struct ctl_table kern_table[] = {

lib/rwsem.c

···
 /*
  * wait for a lock to be granted
  */
-static struct rw_semaphore *
+static struct rw_semaphore __sched *
 rwsem_down_failed_common(struct rw_semaphore *sem,
 			struct rwsem_waiter *waiter, signed long adjustment)
 {