Messages in this thread Patch in this message | | | From | Davidlohr Bueso <> | Subject | [PATCH 3/3] sched/core: update preempt_notifier_key to modern api | Date | Sun, 25 Mar 2018 12:10:56 -0700 |
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No changes in refcount semantics -- key init is false; replace
static_key_slow_inc|dec with static_branch_inc|dec static_key_false with static_branch_unlikely
Signed-off-by: Davidlohr Bueso <dbueso@suse.de> --- kernel/sched/core.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 757d5a251ca4..311451e58c3c 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2462,17 +2462,17 @@ void wake_up_new_task(struct task_struct *p) #ifdef CONFIG_PREEMPT_NOTIFIERS -static struct static_key preempt_notifier_key = STATIC_KEY_INIT_FALSE; +DEFINE_STATIC_KEY_FALSE(preempt_notifier_key); void preempt_notifier_inc(void) { - static_key_slow_inc(&preempt_notifier_key); + static_branch_inc(&preempt_notifier_key); } EXPORT_SYMBOL_GPL(preempt_notifier_inc); void preempt_notifier_dec(void) { - static_key_slow_dec(&preempt_notifier_key); + static_branch_dec(&preempt_notifier_key); } EXPORT_SYMBOL_GPL(preempt_notifier_dec); @@ -2482,7 +2482,7 @@ EXPORT_SYMBOL_GPL(preempt_notifier_dec); */ void preempt_notifier_register(struct preempt_notifier *notifier) { - if (!static_key_false(&preempt_notifier_key)) + if (!static_branch_unlikely(&preempt_notifier_key)) WARN(1, "registering preempt_notifier while notifiers disabled\n"); hlist_add_head(¬ifier->link, ¤t->preempt_notifiers); @@ -2511,7 +2511,7 @@ static void __fire_sched_in_preempt_notifiers(struct task_struct *curr) static __always_inline void fire_sched_in_preempt_notifiers(struct task_struct *curr) { - if (static_key_false(&preempt_notifier_key)) + if (static_branch_unlikely(&preempt_notifier_key)) __fire_sched_in_preempt_notifiers(curr); } @@ -2529,7 +2529,7 @@ static __always_inline void fire_sched_out_preempt_notifiers(struct task_struct *curr, struct task_struct *next) { - if (static_key_false(&preempt_notifier_key)) + if (static_branch_unlikely(&preempt_notifier_key)) __fire_sched_out_preempt_notifiers(curr, next); } -- 2.13.6
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