Bluetooth: optimize barrier usage for Rmw atomics
Use smp_mb__before_atomic() instead of smp_mb() and avoid the unnecessary barrier for non LL/SC architectures, such as x86. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
parent
6c08fc896b
commit
fe66483156
1 changed files with 1 additions and 1 deletions
|
@ -1279,7 +1279,7 @@ static int hidp_session_thread(void *arg)
|
||||||
add_wait_queue(sk_sleep(session->intr_sock->sk), &intr_wait);
|
add_wait_queue(sk_sleep(session->intr_sock->sk), &intr_wait);
|
||||||
/* This memory barrier is paired with wq_has_sleeper(). See
|
/* This memory barrier is paired with wq_has_sleeper(). See
|
||||||
* sock_poll_wait() for more information why this is needed. */
|
* sock_poll_wait() for more information why this is needed. */
|
||||||
smp_mb();
|
smp_mb__before_atomic();
|
||||||
|
|
||||||
/* notify synchronous startup that we're ready */
|
/* notify synchronous startup that we're ready */
|
||||||
atomic_inc(&session->state);
|
atomic_inc(&session->state);
|
||||||
|
|
Loading…
Reference in a new issue