Merge branch 'devicetree/merge' into spi/merge

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

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 5b08215..d7ebdf4 100644 (file)
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -57,6 +57,8 @@ static int __init hardlockup_panic_setup(char *str)
 {
        if (!strncmp(str, "panic", 5))
                hardlockup_panic = 1;
+       else if (!strncmp(str, "0", 1))
+               no_watchdog = 1;
        return 1;
 }
 __setup("nmi_watchdog=", hardlockup_panic_setup);
@@ -116,12 +118,12 @@ static void __touch_watchdog(void)
 {
        int this_cpu = smp_processor_id();
 
-       __get_cpu_var(watchdog_touch_ts) = get_timestamp(this_cpu);
+       __this_cpu_write(watchdog_touch_ts, get_timestamp(this_cpu));
 }
 
 void touch_softlockup_watchdog(void)
 {
-       __raw_get_cpu_var(watchdog_touch_ts) = 0;
+       __this_cpu_write(watchdog_touch_ts, 0);
 }
 EXPORT_SYMBOL(touch_softlockup_watchdog);
 
@@ -165,12 +167,12 @@ void touch_softlockup_watchdog_sync(void)
 /* watchdog detector functions */
 static int is_hardlockup(void)
 {
-       unsigned long hrint = __get_cpu_var(hrtimer_interrupts);
+       unsigned long hrint = __this_cpu_read(hrtimer_interrupts);
 
-       if (__get_cpu_var(hrtimer_interrupts_saved) == hrint)
+       if (__this_cpu_read(hrtimer_interrupts_saved) == hrint)
                return 1;
 
-       __get_cpu_var(hrtimer_interrupts_saved) = hrint;
+       __this_cpu_write(hrtimer_interrupts_saved, hrint);
        return 0;
 }
 #endif
@@ -203,8 +205,8 @@ static void watchdog_overflow_callback(struct perf_event *event, int nmi,
        /* Ensure the watchdog never gets throttled */
        event->hw.interrupts = 0;
 
-       if (__get_cpu_var(watchdog_nmi_touch) == true) {
-               __get_cpu_var(watchdog_nmi_touch) = false;
+       if (__this_cpu_read(watchdog_nmi_touch) == true) {
+               __this_cpu_write(watchdog_nmi_touch, false);
                return;
        }
 
@@ -218,7 +220,7 @@ static void watchdog_overflow_callback(struct perf_event *event, int nmi,
                int this_cpu = smp_processor_id();
 
                /* only print hardlockups once */
-               if (__get_cpu_var(hard_watchdog_warn) == true)
+               if (__this_cpu_read(hard_watchdog_warn) == true)
                        return;
 
                if (hardlockup_panic)
@@ -226,16 +228,16 @@ static void watchdog_overflow_callback(struct perf_event *event, int nmi,
                else
                        WARN(1, "Watchdog detected hard LOCKUP on cpu %d", this_cpu);
 
-               __get_cpu_var(hard_watchdog_warn) = true;
+               __this_cpu_write(hard_watchdog_warn, true);
                return;
        }
 
-       __get_cpu_var(hard_watchdog_warn) = false;
+       __this_cpu_write(hard_watchdog_warn, false);
        return;
 }
 static void watchdog_interrupt_count(void)
 {
-       __get_cpu_var(hrtimer_interrupts)++;
+       __this_cpu_inc(hrtimer_interrupts);
 }
 #else
 static inline void watchdog_interrupt_count(void) { return; }
@@ -244,7 +246,7 @@ static inline void watchdog_interrupt_count(void) { return; }
 /* watchdog kicker functions */
 static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
 {
-       unsigned long touch_ts = __get_cpu_var(watchdog_touch_ts);
+       unsigned long touch_ts = __this_cpu_read(watchdog_touch_ts);
        struct pt_regs *regs = get_irq_regs();
        int duration;
 
@@ -252,18 +254,18 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
        watchdog_interrupt_count();
 
        /* kick the softlockup detector */
-       wake_up_process(__get_cpu_var(softlockup_watchdog));
+       wake_up_process(__this_cpu_read(softlockup_watchdog));
 
        /* .. and repeat */
        hrtimer_forward_now(hrtimer, ns_to_ktime(get_sample_period()));
 
        if (touch_ts == 0) {
-               if (unlikely(__get_cpu_var(softlockup_touch_sync))) {
+               if (unlikely(__this_cpu_read(softlockup_touch_sync))) {
                        /*
                         * If the time stamp was touched atomically
                         * make sure the scheduler tick is up to date.
                         */
-                       __get_cpu_var(softlockup_touch_sync) = false;
+                       __this_cpu_write(softlockup_touch_sync, false);
                        sched_clock_tick();
                }
                __touch_watchdog();
@@ -279,7 +281,7 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
        duration = is_softlockup(touch_ts);
        if (unlikely(duration)) {
                /* only warn once */
-               if (__get_cpu_var(soft_watchdog_warn) == true)
+               if (__this_cpu_read(soft_watchdog_warn) == true)
                        return HRTIMER_RESTART;
 
                printk(KERN_ERR "BUG: soft lockup - CPU#%d stuck for %us! [%s:%d]\n",
@@ -294,9 +296,9 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
 
                if (softlockup_panic)
                        panic("softlockup: hung tasks");
-               __get_cpu_var(soft_watchdog_warn) = true;
+               __this_cpu_write(soft_watchdog_warn, true);
        } else
-               __get_cpu_var(soft_watchdog_warn) = false;
+               __this_cpu_write(soft_watchdog_warn, false);
 
        return HRTIMER_RESTART;
 }
@@ -307,7 +309,7 @@ static enum hrtimer_restart watchdog_timer_fn(struct hrtimer *hrtimer)
  */
 static int watchdog(void *unused)
 {
-       struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
+       static struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
        struct hrtimer *hrtimer = &__raw_get_cpu_var(watchdog_hrtimer);
 
        sched_setscheduler(current, SCHED_FIFO, &param);
@@ -548,13 +550,13 @@ static struct notifier_block __cpuinitdata cpu_nfb = {
        .notifier_call = cpu_callback
 };
 
-static int __init spawn_watchdog_task(void)
+void __init lockup_detector_init(void)
 {
        void *cpu = (void *)(long)smp_processor_id();
        int err;
 
        if (no_watchdog)
-               return 0;
+               return;
 
        err = cpu_callback(&cpu_nfb, CPU_UP_PREPARE, cpu);
        WARN_ON(notifier_to_errno(err));
@@ -562,6 +564,5 @@ static int __init spawn_watchdog_task(void)
        cpu_callback(&cpu_nfb, CPU_ONLINE, cpu);
        register_cpu_notifier(&cpu_nfb);
 
-       return 0;
+       return;
 }
-early_initcall(spawn_watchdog_task);