Re: [PATCH] Fix data race in mark_rt_mutex_waiters

[Waiman Long]

On 1/24/23 10:52, Peter Zijlstra wrote:
> On Tue, Jan 24, 2023 at 10:42:24AM -0500, Waiman Long wrote:
>
> > I would suggest to do it as suggested by PeterZ. Instead of set_bit(),
> > however, it is probably better to use atomic_long_or() like
> >
> > atomic_long_or_relaxed(RT_MUTEX_HAS_WAITERS, (atomic_long_t *)&lock->owner)
> That function doesn't exist, atomic_long_or() is implicitly relaxed for
> not returning a value.
You are right. atomic_long_or() doesn't have variants like some others.

Cheers,
Longman