On Thursday, June 2, 2016 6:09:08 PM CEST Pan Xinhui wrote:
> diff --git a/include/asm-generic/qrwlock.h b/include/asm-generic/qrwlock.h
> index 54a8e65..eadd7a3 100644
> --- a/include/asm-generic/qrwlock.h
> +++ b/include/asm-generic/qrwlock.h
> @@ -139,7 +139,7 @@ static inline void queued_read_unlock(struct qrwlock
> *lock)
> */
> static inline void queued_write_unlock(struct qrwlock *lock)
> {
> - smp_store_release((u8 *)&lock->cnts, 0);
> + (void)atomic_sub_return_release(_QW_LOCKED, &lock->cnts);
> }
Isn't this more expensive than the existing version?
Arnd
org.kde.konsole.desktop
Description: application/desktop
