Re: [PATCH 3/3] sched/core: update preempt_notifier_key to modern api

[Peter Zijlstra]

On Sun, Mar 25, 2018 at 12:10:56PM -0700, Davidlohr Bueso wrote:
> 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@xxxxxxx>
> ---
>  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);

and again..