Re: [PATCH 7/7] posix-cpu-timers: Recalc next expiration when timer_settime() ends up not queueing

[Peter Zijlstra]

On Wed, Jun 23, 2021 at 01:41:55AM +0200, Frederic Weisbecker wrote:
>  include/linux/posix-timers.h   |  7 +++++-
>  kernel/time/posix-cpu-timers.c | 41 +++++++++++++++++++++++++++++-----
>  2 files changed, 41 insertions(+), 7 deletions(-)
> 
> diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h
> index 4cf1fbe8d1bc..00fef0064355 100644
> --- a/include/linux/posix-timers.h
> +++ b/include/linux/posix-timers.h
> @@ -82,9 +82,14 @@ static inline bool cpu_timer_enqueue(struct timerqueue_head *head,
>  	return timerqueue_add(head, &ctmr->node);
>  }
>  
> +static inline bool cpu_timer_queued(struct cpu_timer *ctmr)
> +{
> +	return !!ctmr->head;

Sad that we can't check sighand lock here... but I agree that adding
that will be messy :/

> +}