Re: [PATCH-tip v7 00/20] locking/rwsem: Rwsem rearchitecture part 2

[Linus Torvalds]

This doesn't seem to be the full diff - looking at that patch 1 you
seem to have taken my suggested list_cut_before() change too.

I'm not against it (it does seem to be simpler and better), I just
hope you double-checked it, since I kind of hand-waved it.

                    Linus

On Sun, Apr 28, 2019 at 2:26 PM Waiman Long <longman@xxxxxxxxxx> wrote:
>
>  v6=>v7 diff
>  -----------
> diff --git a/kernel/locking/rwsem.c b/kernel/locking/rwsem.c
> index 97a2334d9cd3..60783267b50d 100644
> --- a/kernel/locking/rwsem.c
> +++ b/kernel/locking/rwsem.c
> @@ -693,7 +693,7 @@ static void __rwsem_mark_wake(struct rw_semaphore *sem,
>                 atomic_long_add(adjustment, &sem->count);
>
>         /* 2nd pass */
> -       list_for_each_entry(waiter, &wlist, list) {
> +       list_for_each_entry_safe(waiter, tmp, &wlist, list) {
>                 struct task_struct *tsk;
>
>                 tsk = waiter->task;
>