On Tue, Jun 10, 2025 at 01:52:28PM +0900, Sergey Senozhatsky wrote:
> Allows exclusive waits with a custom @state.
>
> Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
> ---
>
> v2: switched to wait_event_state_exclusive()
>
> include/linux/wait.h | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/include/linux/wait.h b/include/linux/wait.h
> index 327894f022cf..9ebb0d2e422a 100644
> --- a/include/linux/wait.h
> +++ b/include/linux/wait.h
> @@ -968,6 +968,18 @@ extern int do_wait_intr_irq(wait_queue_head_t *, wait_queue_entry_t *);
> state, 0, timeout, \
> __ret = schedule_timeout(__ret))
>
> +#define __wait_event_state_exclusive(wq, condition, state) \
> + ___wait_event(wq, condition, state, 1, 0, schedule())
> +
> +#define wait_event_state_exclusive(wq, condition, state) \
> +({ \
> + int __ret = 0; \
> + might_sleep(); \
> + if (!(condition)) \
> + __ret = __wait_event_state_exclusive(wq, condition, state); \
> + __ret; \
> +})
> +
> #define __wait_event_killable_timeout(wq_head, condition, timeout) \
> ___wait_event(wq_head, ___wait_cond_timeout(condition), \
> TASK_KILLABLE, 0, timeout, \
> --
> 2.50.0.rc1.591.g9c95f17f64-goog
>
