btrfs: backref: Fix soft lockup in __merge_refs function

[cascardo/linux.git] / kernel / time / tick-sched.c

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 58e3310..536ada8 100644 (file)
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -262,7 +262,7 @@ static void tick_nohz_dep_set_all(atomic_t *dep,
 {
        int prev;
 
-       prev = atomic_fetch_or(dep, BIT(bit));
+       prev = atomic_fetch_or(BIT(bit), dep);
        if (!prev)
                tick_nohz_full_kick_all();
 }
@@ -292,7 +292,7 @@ void tick_nohz_dep_set_cpu(int cpu, enum tick_dep_bits bit)
 
        ts = per_cpu_ptr(&tick_cpu_sched, cpu);
 
-       prev = atomic_fetch_or(&ts->tick_dep_mask, BIT(bit));
+       prev = atomic_fetch_or(BIT(bit), &ts->tick_dep_mask);
        if (!prev) {
                preempt_disable();
                /* Perf needs local kick that is NMI safe */
@@ -776,6 +776,7 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts,
        if (!ts->tick_stopped) {
                nohz_balance_enter_idle(cpu);
                calc_load_enter_idle();
+               cpu_load_update_nohz_start();
 
                ts->last_tick = hrtimer_get_expires(&ts->sched_timer);
                ts->tick_stopped = 1;
@@ -802,11 +803,11 @@ out:
        return tick;
 }
 
-static void tick_nohz_restart_sched_tick(struct tick_sched *ts, ktime_t now, int active)
+static void tick_nohz_restart_sched_tick(struct tick_sched *ts, ktime_t now)
 {
        /* Update jiffies first */
        tick_do_update_jiffies64(now);
-       update_cpu_load_nohz(active);
+       cpu_load_update_nohz_stop();
 
        calc_load_exit_idle();
        touch_softlockup_watchdog_sched();
@@ -833,7 +834,7 @@ static void tick_nohz_full_update_tick(struct tick_sched *ts)
        if (can_stop_full_tick(ts))
                tick_nohz_stop_sched_tick(ts, ktime_get(), cpu);
        else if (ts->tick_stopped)
-               tick_nohz_restart_sched_tick(ts, ktime_get(), 1);
+               tick_nohz_restart_sched_tick(ts, ktime_get());
 #endif
 }
 
@@ -1024,7 +1025,7 @@ void tick_nohz_idle_exit(void)
                tick_nohz_stop_idle(ts, now);
 
        if (ts->tick_stopped) {
-               tick_nohz_restart_sched_tick(ts, now, 0);
+               tick_nohz_restart_sched_tick(ts, now);
                tick_nohz_account_idle_ticks(ts);
        }