parisc: fix bug in compat_arch_ptrace

[pandora-kernel.git] / kernel / hrtimer.c

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 2b465df..47e6334 100644 (file)
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -664,14 +664,6 @@ static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
 
                /* Timer is expired, act upon the callback mode */
                switch(timer->cb_mode) {
-               case HRTIMER_CB_IRQSAFE_NO_RESTART:
-                       debug_hrtimer_deactivate(timer);
-                       /*
-                        * We can call the callback from here. No restart
-                        * happens, so no danger of recursion
-                        */
-                       BUG_ON(timer->function(timer) != HRTIMER_NORESTART);
-                       return 1;
                case HRTIMER_CB_IRQSAFE_PERCPU:
                case HRTIMER_CB_IRQSAFE_UNLOCKED:
                        /*
@@ -683,7 +675,6 @@ static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
                         */
                        debug_hrtimer_deactivate(timer);
                        return 1;
-               case HRTIMER_CB_IRQSAFE:
                case HRTIMER_CB_SOFTIRQ:
                        /*
                         * Move everything else into the softirq pending list !
@@ -1209,6 +1200,7 @@ static void run_hrtimer_pending(struct hrtimer_cpu_base *cpu_base)
                enum hrtimer_restart (*fn)(struct hrtimer *);
                struct hrtimer *timer;
                int restart;
+               int emulate_hardirq_ctx = 0;
 
                timer = list_entry(cpu_base->cb_pending.next,
                                   struct hrtimer, cb_entry);
@@ -1217,10 +1209,24 @@ static void run_hrtimer_pending(struct hrtimer_cpu_base *cpu_base)
                timer_stats_account_hrtimer(timer);
 
                fn = timer->function;
+               /*
+                * A timer might have been added to the cb_pending list
+                * when it was migrated during a cpu-offline operation.
+                * Emulate hardirq context for such timers.
+                */
+               if (timer->cb_mode == HRTIMER_CB_IRQSAFE_PERCPU ||
+                   timer->cb_mode == HRTIMER_CB_IRQSAFE_UNLOCKED)
+                       emulate_hardirq_ctx = 1;
+
                __remove_hrtimer(timer, timer->base, HRTIMER_STATE_CALLBACK, 0);
                spin_unlock_irq(&cpu_base->lock);
 
-               restart = fn(timer);
+               if (unlikely(emulate_hardirq_ctx)) {
+                       local_irq_disable();
+                       restart = fn(timer);
+                       local_irq_enable();
+               } else
+                       restart = fn(timer);
 
                spin_lock_irq(&cpu_base->lock);