10 files changed, 158 insertions, 21 deletions

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 72d034258b..eb1ddebd2c 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -558,7 +558,8 @@ static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
  */
 static int hrtimer_switch_to_hres(void)
 {
-        struct hrtimer_cpu_base *base = &__get_cpu_var(hrtimer_bases);
+        int cpu = smp_processor_id();
+        struct hrtimer_cpu_base *base = &per_cpu(hrtimer_bases, cpu);
         unsigned long flags;
 
         if (base->hres_active)
@@ -568,6 +569,8 @@ static int hrtimer_switch_to_hres(void)
 
         if (tick_init_highres()) {
                 local_irq_restore(flags);
+                printk(KERN_WARNING "Could not switch to high resolution "
+                                    "mode on CPU %d\n", cpu);
                 return 0;
         }
         base->hres_active = 1;
@@ -683,6 +686,7 @@ static void enqueue_hrtimer(struct hrtimer *timer,
         struct rb_node **link = &base->active.rb_node;
         struct rb_node *parent = NULL;
         struct hrtimer *entry;
+        int leftmost = 1;
 
         /*
          * Find the right place in the rbtree:
@@ -694,18 +698,19 @@ static void enqueue_hrtimer(struct hrtimer *timer,
                  * We dont care about collisions. Nodes with
                  * the same expiry time stay together.
                  */
-                if (timer->expires.tv64 < entry->expires.tv64)
+                if (timer->expires.tv64 < entry->expires.tv64) {
                         link = &(*link)->rb_left;
-                else
+                } else {
                         link = &(*link)->rb_right;
+                        leftmost = 0;
+                }
         }
 
         /*
          * Insert the timer to the rbtree and check whether it
          * replaces the first pending timer
          */
-        if (!base->first || timer->expires.tv64 <
-            rb_entry(base->first, struct hrtimer, node)->expires.tv64) {
+        if (leftmost) {
                 /*
                  * Reprogram the clock event device. When the timer is already
                  * expired hrtimer_enqueue_reprogram has either called the
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index b4f1674fca..50b81b9804 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -19,7 +19,15 @@ static struct proc_dir_entry *root_irq_dir;
 static int irq_affinity_read_proc(char *page, char **start, off_t off,
                                   int count, int *eof, void *data)
 {
-        int len = cpumask_scnprintf(page, count, irq_desc[(long)data].affinity);
+        struct irq_desc *desc = irq_desc + (long)data;
+        cpumask_t *mask = &desc->affinity;
+        int len;
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+        if (desc->status & IRQ_MOVE_PENDING)
+                mask = &desc->pending_mask;
+#endif
+        len = cpumask_scnprintf(page, count, *mask);
 
         if (count - len < 2)
                 return -EINVAL;
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 7358609e47..c1a106d87d 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -57,7 +57,7 @@ config DISABLE_CONSOLE_SUSPEND
 
 config PM_TRACE
         bool "Suspend/resume event tracing"
-        depends on PM_DEBUG && X86_32 && EXPERIMENTAL
+        depends on PM_DEBUG && X86 && EXPERIMENTAL
         default n
         ---help---
         This enables some cheesy code to save the last PM event point in the
diff --git a/kernel/signal.c b/kernel/signal.c
index 39d122753b..ef8156a6aa 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -255,6 +255,16 @@ flush_signal_handlers(struct task_struct *t, int force_default)
         }
 }
 
+int unhandled_signal(struct task_struct *tsk, int sig)
+{
+        if (is_init(tsk))
+                return 1;
+        if (tsk->ptrace & PT_PTRACED)
+                return 0;
+        return (tsk->sighand->action[sig-1].sa.sa_handler == SIG_IGN) ||
+                (tsk->sighand->action[sig-1].sa.sa_handler == SIG_DFL);
+}
+
 
 /* Notify the system that a driver wants to block all signals for this
  * process, and wants to be notified if any signals at all were to be
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 222299844a..ddebf3f2af 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1203,6 +1203,16 @@ static ctl_table fs_table[] = {
 };
 
 static ctl_table debug_table[] = {
+#ifdef CONFIG_X86
+        {
+                .ctl_name       = CTL_UNNUMBERED,
+                .procname       = "exception-trace",
+                .data           = &show_unhandled_signals,
+                .maxlen         = sizeof(int),
+                .mode           = 0644,
+                .proc_handler   = proc_dointvec
+        },
+#endif
         { .ctl_name = 0 }
 };
 
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index b5e352597c..cd91237dbf 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -10,6 +10,7 @@
 
 #include <linux/mm.h>
 #include <linux/time.h>
+#include <linux/timer.h>
 #include <linux/timex.h>
 #include <linux/jiffies.h>
 #include <linux/hrtimer.h>
@@ -175,12 +176,64 @@ u64 current_tick_length(void)
         return tick_length;
 }
 
+#ifdef CONFIG_GENERIC_CMOS_UPDATE
 
-void __attribute__ ((weak)) notify_arch_cmos_timer(void)
+/* Disable the cmos update - used by virtualization and embedded */
+int no_sync_cmos_clock  __read_mostly;
+
+static void sync_cmos_clock(unsigned long dummy);
+
+static DEFINE_TIMER(sync_cmos_timer, sync_cmos_clock, 0, 0);
+
+static void sync_cmos_clock(unsigned long dummy)
+{
+        struct timespec now, next;
+        int fail = 1;
+
+        /*
+         * If we have an externally synchronized Linux clock, then update
+         * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
+         * called as close as possible to 500 ms before the new second starts.
+         * This code is run on a timer.  If the clock is set, that timer
+         * may not expire at the correct time.  Thus, we adjust...
+         */
+        if (!ntp_synced())
+                /*
+                 * Not synced, exit, do not restart a timer (if one is
+                 * running, let it run out).
+                 */
+                return;
+
+        getnstimeofday(&now);
+        if (abs(xtime.tv_nsec - (NSEC_PER_SEC / 2)) <= tick_nsec / 2)
+                fail = update_persistent_clock(now);
+
+        next.tv_nsec = (NSEC_PER_SEC / 2) - now.tv_nsec;
+        if (next.tv_nsec <= 0)
+                next.tv_nsec += NSEC_PER_SEC;
+
+        if (!fail)
+                next.tv_sec = 659;
+        else
+                next.tv_sec = 0;
+
+        if (next.tv_nsec >= NSEC_PER_SEC) {
+                next.tv_sec++;
+                next.tv_nsec -= NSEC_PER_SEC;
+        }
+        mod_timer(&sync_cmos_timer, jiffies + timespec_to_jiffies(&next));
+}
+
+static void notify_cmos_timer(void)
 {
-        return;
+        if (no_sync_cmos_clock)
+                mod_timer(&sync_cmos_timer, jiffies + 1);
 }
 
+#else
+static inline void notify_cmos_timer(void) { }
+#endif
+
 /* adjtimex mainly allows reading (and writing, if superuser) of
  * kernel time-keeping variables. used by xntpd.
  */
@@ -345,6 +398,6 @@ leave:	if ((time_status & (STA_UNSYNC|STA_CLOCKERR)) != 0)
         txc->stbcnt        = 0;
         write_sequnlock_irq(&xtime_lock);
         do_gettimeofday(&txc->time);
-        notify_arch_cmos_timer();
+        notify_cmos_timer();
         return(result);
 }
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index 8001d37071..db8e0f3d40 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -31,6 +31,12 @@ struct tick_device tick_broadcast_device;
 static cpumask_t tick_broadcast_mask;
 static DEFINE_SPINLOCK(tick_broadcast_lock);
 
+#ifdef CONFIG_TICK_ONESHOT
+static void tick_broadcast_clear_oneshot(int cpu);
+#else
+static inline void tick_broadcast_clear_oneshot(int cpu) { }
+#endif
+
 /*
  * Debugging: see timer_list.c
  */
@@ -49,7 +55,7 @@ cpumask_t *tick_get_broadcast_mask(void)
  */
 static void tick_broadcast_start_periodic(struct clock_event_device *bc)
 {
-        if (bc && bc->mode == CLOCK_EVT_MODE_SHUTDOWN)
+        if (bc)
                 tick_setup_periodic(bc, 1);
 }
 
@@ -99,8 +105,19 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu)
                 cpu_set(cpu, tick_broadcast_mask);
                 tick_broadcast_start_periodic(tick_broadcast_device.evtdev);
                 ret = 1;
-        }
+        } else {
+                /*
+                 * When the new device is not affected by the stop
+                 * feature and the cpu is marked in the broadcast mask
+                 * then clear the broadcast bit.
+                 */
+                if (!(dev->features & CLOCK_EVT_FEAT_C3STOP)) {
+                        int cpu = smp_processor_id();
 
+                        cpu_clear(cpu, tick_broadcast_mask);
+                        tick_broadcast_clear_oneshot(cpu);
+                }
+        }
         spin_unlock_irqrestore(&tick_broadcast_lock, flags);
         return ret;
 }
@@ -299,7 +316,7 @@ void tick_suspend_broadcast(void)
         spin_lock_irqsave(&tick_broadcast_lock, flags);
 
         bc = tick_broadcast_device.evtdev;
-        if (bc && tick_broadcast_device.mode == TICKDEV_MODE_PERIODIC)
+        if (bc)
                 clockevents_set_mode(bc, CLOCK_EVT_MODE_SHUTDOWN);
 
         spin_unlock_irqrestore(&tick_broadcast_lock, flags);
@@ -316,6 +333,8 @@ int tick_resume_broadcast(void)
         bc = tick_broadcast_device.evtdev;
 
         if (bc) {
+                clockevents_set_mode(bc, CLOCK_EVT_MODE_RESUME);
+
                 switch (tick_broadcast_device.mode) {
                 case TICKDEV_MODE_PERIODIC:
                         if(!cpus_empty(tick_broadcast_mask))
@@ -485,6 +504,16 @@ out:
         spin_unlock_irqrestore(&tick_broadcast_lock, flags);
 }
 
+/*
+ * Reset the one shot broadcast for a cpu
+ *
+ * Called with tick_broadcast_lock held
+ */
+static void tick_broadcast_clear_oneshot(int cpu)
+{
+        cpu_clear(cpu, tick_broadcast_oneshot_mask);
+}
+
 /**
  * tick_broadcast_setup_highres - setup the broadcast device for highres
  */
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index a96ec9ab34..77a21abc87 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -318,12 +318,17 @@ static void tick_resume(void)
 {
         struct tick_device *td = &__get_cpu_var(tick_cpu_device);
         unsigned long flags;
+        int broadcast = tick_resume_broadcast();
 
         spin_lock_irqsave(&tick_device_lock, flags);
-        if (td->mode == TICKDEV_MODE_PERIODIC)
-                tick_setup_periodic(td->evtdev, 0);
-        else
-                tick_resume_oneshot();
+        clockevents_set_mode(td->evtdev, CLOCK_EVT_MODE_RESUME);
+
+        if (!broadcast) {
+                if (td->mode == TICKDEV_MODE_PERIODIC)
+                        tick_setup_periodic(td->evtdev, 0);
+                else
+                        tick_resume_oneshot();
+        }
         spin_unlock_irqrestore(&tick_device_lock, flags);
 }
 
@@ -360,8 +365,7 @@ static int tick_notify(struct notifier_block *nb, unsigned long reason,
                 break;
 
         case CLOCK_EVT_NOTIFY_RESUME:
-                if (!tick_resume_broadcast())
-                        tick_resume();
+                tick_resume();
                 break;
 
         default:
diff --git a/kernel/time/tick-oneshot.c b/kernel/time/tick-oneshot.c
index f6997ab0c3..0258d3115d 100644
--- a/kernel/time/tick-oneshot.c
+++ b/kernel/time/tick-oneshot.c
@@ -73,8 +73,21 @@ int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *))
         struct clock_event_device *dev = td->evtdev;
 
         if (!dev || !(dev->features & CLOCK_EVT_FEAT_ONESHOT) ||
-            !tick_device_is_functional(dev))
+                    !tick_device_is_functional(dev)) {
+
+                printk(KERN_INFO "Clockevents: "
+                       "could not switch to one-shot mode:");
+                if (!dev) {
+                        printk(" no tick device\n");
+                } else {
+                        if (!tick_device_is_functional(dev))
+                                printk(" %s is not functional.\n", dev->name);
+                        else
+                                printk(" %s does not support one-shot mode.\n",
+                                       dev->name);
+                }
                 return -EINVAL;
+        }
 
         td->mode = TICKDEV_MODE_ONESHOT;
         dev->event_handler = handler;
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 52db9e3c52..b416995b97 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -546,6 +546,7 @@ void tick_setup_sched_timer(void)
 {
         struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
         ktime_t now = ktime_get();
+        u64 offset;
 
         /*
          * Emulate tick processing via per-CPU hrtimers:
@@ -554,8 +555,12 @@ void tick_setup_sched_timer(void)
         ts->sched_timer.function = tick_sched_timer;
         ts->sched_timer.cb_mode = HRTIMER_CB_IRQSAFE_NO_SOFTIRQ;
 
-        /* Get the next period */
+        /* Get the next period (per cpu) */
         ts->sched_timer.expires = tick_init_jiffy_update();
+        offset = ktime_to_ns(tick_period) >> 1;
+        do_div(offset, NR_CPUS);
+        offset *= smp_processor_id();
+        ts->sched_timer.expires = ktime_add_ns(ts->sched_timer.expires, offset);
 
         for (;;) {
                 hrtimer_forward(&ts->sched_timer, now, tick_period);