[PATCH v3 08/13] sched/wait: Add a waitqueue helper for fully exclusive priority waiters

[K Prateek Nayak]

Hello Sean,

On 5/23/2025 5:22 AM, Sean Christopherson wrote:
> Add a waitqueue helper to add a priority waiter that requires exclusive
> wakeups, i.e. that requires that it be the _only_ priority waiter.  The
> API will be used by KVM to ensure that at most one of KVM's irqfds is
> bound to a single eventfd (across the entire kernel).
> 
> Open code the helper instead of using __add_wait_queue() so that the
> common path doesn't need to "handle" impossible failures.
> 
> Cc: K Prateek Nayak <kprateek.nayak at amd.com>

Feel free to include:

Reviewed-by: K Prateek Nayak <kprateek.nayak at amd.com>

-- 
Thanks and Regards,
Prateek

> Signed-off-by: Sean Christopherson <seanjc at google.com>
> ---
>   include/linux/wait.h |  2 ++
>   kernel/sched/wait.c  | 18 ++++++++++++++++++
>   2 files changed, 20 insertions(+)
> [..snip..]