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| author |   Andrea Parri <andrea.parri@amarulasolutions.com> | 2018-08-14 20:41:06 +0200 |
|---|---|---|
| committer |   Marcel Holtmann <marcel@holtmann.org> | 2018-09-27 11:59:58 +0200 |
| commit | 5aac49378742a52bbe8af3d25bc51b487be7b17f (patch) | |
| tree | 766b8ef63da32898842943c4d4df7d63b9b04af1 /net/bluetooth/bnep | |
| parent | net-ipv4: remove 2 always zero parameters from ipv4_redirect() (diff) | |
| download | linux-dev-5aac49378742a52bbe8af3d25bc51b487be7b17f.tar.xz linux-dev-5aac49378742a52bbe8af3d25bc51b487be7b17f.zip | |
Bluetooth: Remove unnecessary smp_mb__{before,after}_atomic
The barriers are unneeded; wait_woken() and woken_wake_function()
already provide us with the required synchronization: remove them
and document that we're relying on the (implicit) synchronization
provided by wait_woken() and woken_wake_function().
Signed-off-by: Andrea Parri <andrea.parri@amarulasolutions.com>
Reviewed-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth/bnep')
| -rw-r--r-- | net/bluetooth/bnep/core.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c index 7b3965861013..43c284158f63 100644 --- a/net/bluetooth/bnep/core.c +++ b/net/bluetooth/bnep/core.c @@ -489,9 +489,6 @@ static int bnep_session(void *arg) add_wait_queue(sk_sleep(sk), &wait); while (1) { - /* Ensure session->terminate is updated */ - smp_mb__before_atomic(); - if (atomic_read(&s->terminate)) break; /* RX */ @@ -512,6 +509,10 @@ static int bnep_session(void *arg) break; netif_wake_queue(dev); + /* + * wait_woken() performs the necessary memory barriers + * for us; see the header comment for this primitive. + */ wait_woken(&wait, TASK_INTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT); } remove_wait_queue(sk_sleep(sk), &wait); |