Merge branch 'linux-2.6'

10 files changed, 75 insertions, 63 deletions

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 9b5dff6b3f6..44019ce30a1 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -297,18 +297,13 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc)
 
 	if (unlikely(desc->status & IRQ_INPROGRESS))
 		goto out_unlock;
+	desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
 	kstat_cpu(cpu).irqs[irq]++;
 
 	action = desc->action;
-	if (unlikely(!action || (desc->status & IRQ_DISABLED))) {
-		if (desc->chip->mask)
-			desc->chip->mask(irq);
-		desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
-		desc->status |= IRQ_PENDING;
+	if (unlikely(!action || (desc->status & IRQ_DISABLED)))
 		goto out_unlock;
-	}
 
-	desc->status &= ~(IRQ_REPLAY | IRQ_WAITING | IRQ_PENDING);
 	desc->status |= IRQ_INPROGRESS;
 	spin_unlock(&desc->lock);
 
diff --git a/kernel/panic.c b/kernel/panic.c
index 6f6e03e9159..da4d6bac270 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -19,6 +19,7 @@
 #include <linux/nmi.h>
 #include <linux/kexec.h>
 #include <linux/debug_locks.h>
+#include <linux/random.h>
 
 int panic_on_oops;
 int tainted;
@@ -266,12 +267,29 @@ void oops_enter(void)
 }
 
 /*
+ * 64-bit random ID for oopses:
+ */
+static u64 oops_id;
+
+static int init_oops_id(void)
+{
+	if (!oops_id)
+		get_random_bytes(&oops_id, sizeof(oops_id));
+
+	return 0;
+}
+late_initcall(init_oops_id);
+
+/*
  * Called when the architecture exits its oops handler, after printing
  * everything.
  */
 void oops_exit(void)
 {
 	do_oops_enter_exit();
+	init_oops_id();
+	printk(KERN_WARNING "---[ end trace %016llx ]---\n",
+		(unsigned long long)oops_id);
 }
 
 #ifdef CONFIG_CC_STACKPROTECTOR
diff --git a/kernel/rwsem.c b/kernel/rwsem.c
index 1ec620c0306..cae050b05f5 100644
--- a/kernel/rwsem.c
+++ b/kernel/rwsem.c
@@ -6,6 +6,7 @@
 
 #include <linux/types.h>
 #include <linux/kernel.h>
+#include <linux/sched.h>
 #include <linux/module.h>
 #include <linux/rwsem.h>
 
@@ -15,7 +16,7 @@
 /*
  * 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_);
@@ -42,7 +43,7 @@ EXPORT_SYMBOL(down_read_trylock);
 /*
  * 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_);
diff --git a/kernel/sched.c b/kernel/sched.c
index c6e551de795..3df84ea6aba 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -508,10 +508,15 @@ EXPORT_SYMBOL_GPL(cpu_clock);
 # 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)
@@ -540,7 +545,7 @@ static inline int task_running(struct rq *rq, struct task_struct *p)
 #ifdef CONFIG_SMP
 	return p->oncpu;
 #else
-	return rq->curr == p;
+	return task_current(rq, p);
 #endif
 }
 
@@ -663,6 +668,7 @@ void sched_clock_idle_wakeup_event(u64 delta_ns)
 	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
@@ -3334,7 +3340,7 @@ unsigned long long task_sched_runtime(struct task_struct *p)
 
 	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)
@@ -4021,7 +4027,7 @@ void rt_mutex_setprio(struct task_struct *p, int prio)
 
 	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)
@@ -4332,7 +4338,7 @@ recheck:
 	}
 	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)
@@ -7101,7 +7107,7 @@ void sched_move_task(struct task_struct *tsk)
 
 	update_rq_clock(rq);
 
-	running = task_running(rq, tsk);
+	running = task_current(rq, tsk);
 	on_rq = tsk->se.on_rq;
 
 	if (on_rq) {
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index c33f0ceb3de..da7c061e720 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -511,8 +511,7 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
 
 	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. */
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index ee9c8b6529e..9ba3daa0347 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -208,6 +208,8 @@ move_one_task_rt(struct rq *this_rq, int this_cpu, struct rq *busiest,
 
 static void task_tick_rt(struct rq *rq, struct task_struct *p)
 {
+	update_curr_rt(rq);
+
 	/*
 	 * RR tasks need a special form of timeslice management.
 	 * FIFO tasks have no timeslices.
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 8ac51714b08..c68f68dcc60 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -225,10 +225,10 @@ static struct ctl_table root_table[] = {
 };
 
 #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[] = {
@@ -906,11 +906,11 @@ static struct ctl_table vm_table[] = {
 	},
 	{
 		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "hugetlb_dynamic_pool",
-		.data		= &hugetlb_dynamic_pool,
-		.maxlen		= sizeof(hugetlb_dynamic_pool),
+		.procname	= "nr_overcommit_hugepages",
+		.data		= &nr_overcommit_huge_pages,
+		.maxlen		= sizeof(nr_overcommit_huge_pages),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= &proc_doulongvec_minmax,
 	},
 #endif
 	{
diff --git a/kernel/sysctl_check.c b/kernel/sysctl_check.c
index bed939f82c3..a68425a5cc1 100644
--- a/kernel/sysctl_check.c
+++ b/kernel/sysctl_check.c
@@ -428,7 +428,7 @@ static struct trans_ctl_table trans_net_netrom_table[] = {
 	{}
 };
 
-static struct trans_ctl_table trans_net_ax25_table[] = {
+static struct trans_ctl_table trans_net_ax25_param_table[] = {
 	{ NET_AX25_IP_DEFAULT_MODE,	"ip_default_mode" },
 	{ NET_AX25_DEFAULT_MODE,	"ax25_default_mode" },
 	{ NET_AX25_BACKOFF_TYPE,	"backoff_type" },
@@ -446,6 +446,11 @@ static struct trans_ctl_table trans_net_ax25_table[] = {
 	{}
 };
 
+static struct trans_ctl_table trans_net_ax25_table[] = {
+	{ 0, NULL, trans_net_ax25_param_table },
+	{}
+};
+
 static struct trans_ctl_table trans_net_bridge_table[] = {
 	{ NET_BRIDGE_NF_CALL_ARPTABLES,		"bridge-nf-call-arptables" },
 	{ NET_BRIDGE_NF_CALL_IPTABLES,		"bridge-nf-call-iptables" },
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index aa82d7bf478..5b86698faa0 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -384,45 +384,19 @@ int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
 }
 
 /*
- * Reprogram the broadcast device:
- *
- * Called with tick_broadcast_lock held and interrupts disabled.
- */
-static int tick_broadcast_reprogram(void)
-{
-	ktime_t expires = { .tv64 = KTIME_MAX };
-	struct tick_device *td;
-	int cpu;
-
-	/*
-	 * Find the event which expires next:
-	 */
-	for (cpu = first_cpu(tick_broadcast_oneshot_mask); cpu != NR_CPUS;
-	     cpu = next_cpu(cpu, tick_broadcast_oneshot_mask)) {
-		td = &per_cpu(tick_cpu_device, cpu);
-		if (td->evtdev->next_event.tv64 < expires.tv64)
-			expires = td->evtdev->next_event;
-	}
-
-	if (expires.tv64 == KTIME_MAX)
-		return 0;
-
-	return tick_broadcast_set_event(expires, 0);
-}
-
-/*
  * Handle oneshot mode broadcasting
  */
 static void tick_handle_oneshot_broadcast(struct clock_event_device *dev)
 {
 	struct tick_device *td;
 	cpumask_t mask;
-	ktime_t now;
+	ktime_t now, next_event;
 	int cpu;
 
 	spin_lock(&tick_broadcast_lock);
 again:
 	dev->next_event.tv64 = KTIME_MAX;
+	next_event.tv64 = KTIME_MAX;
 	mask = CPU_MASK_NONE;
 	now = ktime_get();
 	/* Find all expired events */
@@ -431,19 +405,31 @@ again:
 		td = &per_cpu(tick_cpu_device, cpu);
 		if (td->evtdev->next_event.tv64 <= now.tv64)
 			cpu_set(cpu, mask);
+		else if (td->evtdev->next_event.tv64 < next_event.tv64)
+			next_event.tv64 = td->evtdev->next_event.tv64;
 	}
 
 	/*
-	 * Wakeup the cpus which have an expired event. The broadcast
-	 * device is reprogrammed in the return from idle code.
+	 * Wakeup the cpus which have an expired event.
+	 */
+	tick_do_broadcast(mask);
+
+	/*
+	 * Two reasons for reprogram:
+	 *
+	 * - The global event did not expire any CPU local
+	 * events. This happens in dyntick mode, as the maximum PIT
+	 * delta is quite small.
+	 *
+	 * - There are pending events on sleeping CPUs which were not
+	 * in the event mask
 	 */
-	if (!tick_do_broadcast(mask)) {
+	if (next_event.tv64 != KTIME_MAX) {
 		/*
-		 * The global event did not expire any CPU local
-		 * events. This happens in dyntick mode, as the
-		 * maximum PIT delta is quite small.
+		 * Rearm the broadcast device. If event expired,
+		 * repeat the above
 		 */
-		if (tick_broadcast_reprogram())
+		if (tick_broadcast_set_event(next_event, 0))
 			goto again;
 	}
 	spin_unlock(&tick_broadcast_lock);
diff --git a/kernel/timer.c b/kernel/timer.c
index a05817c021d..d4527dcef1a 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1219,11 +1219,11 @@ asmlinkage long sys_sysinfo(struct sysinfo __user *info)
  */
 static struct lock_class_key base_lock_keys[NR_CPUS];
 
-static int __devinit init_timers_cpu(int cpu)
+static int __cpuinit init_timers_cpu(int cpu)
 {
 	int j;
 	tvec_base_t *base;
-	static char __devinitdata tvec_base_done[NR_CPUS];
+	static char __cpuinitdata tvec_base_done[NR_CPUS];
 
 	if (!tvec_base_done[cpu]) {
 		static char boot_done;