On Sat, 21 Jul 2007 19:02:06 +0400 Oleg Nesterov <[EMAIL PROTECTED]> wrote:
> Make sure that spin_unlock_wait() is properly ordered wrt atomic_inc().
>
> Signed-off-by: Oleg Nesterov <[EMAIL PROTECTED]>
>
> --- t/net/dccp/ccid.c~ccid 2006-12-18 18:17:31.000000000 +0300
> +++ t/net/dccp/ccid.c 2007-07-21 18:29:21.000000000 +0400
> @@ -40,6 +40,7 @@ static inline void ccids_write_unlock(vo
> static inline void ccids_read_lock(void)
> {
> atomic_inc(&ccids_lockct);
> + smp_mb__after_atomic_inc();
> spin_unlock_wait(&ccids_lock);
> }
>
Why not just use standard rwlocks in there?
(This is probably an FAQ, but it should be).
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