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| author |   Takashi Iwai <tiwai@suse.de> | 2015-12-23 08:30:28 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-12-23 08:30:28 +0100 |
| commit | 0fb0b822d157325b66c503d23332f64899bfb828 (patch) | |
| tree | 0699437223be8c87a9c4951c46a5fe27681d57e5 /kernel/locking/osq_lock.c | |
| parent | ALSA: hda/realtek - Fix silent headphone output on MacPro 4,1 (v2) (diff) | |
| parent | Merge remote-tracking branches 'asoc/fix/davinci', 'asoc/fix/es8328', 'asoc/fix/fsl-sai', 'asoc/fix/rockchip', 'asoc/fix/sgtl5000' and 'asoc/fix/wm8974' into asoc-linus (diff) | |
| download | linux-dev-0fb0b822d157325b66c503d23332f64899bfb828.tar.xz linux-dev-0fb0b822d157325b66c503d23332f64899bfb828.zip | |
Merge tag 'asoc-fix-v4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v4.4
A collection of small driver specific fixes here, nothing that'll affect
users who don't have the devices concerned. At least the wm8974 bug
indicates that there's not too many users of some of these devices.
Diffstat (limited to 'kernel/locking/osq_lock.c')
| -rw-r--r-- | kernel/locking/osq_lock.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/kernel/locking/osq_lock.c b/kernel/locking/osq_lock.c index d092a0c9c2d4..05a37857ab55 100644 --- a/kernel/locking/osq_lock.c +++ b/kernel/locking/osq_lock.c @@ -93,10 +93,12 @@ bool osq_lock(struct optimistic_spin_queue *lock) node->cpu = curr; /* - * ACQUIRE semantics, pairs with corresponding RELEASE - * in unlock() uncontended, or fastpath. + * We need both ACQUIRE (pairs with corresponding RELEASE in + * unlock() uncontended, or fastpath) and RELEASE (to publish + * the node fields we just initialised) semantics when updating + * the lock tail. */ - old = atomic_xchg_acquire(&lock->tail, curr); + old = atomic_xchg(&lock->tail, curr); if (old == OSQ_UNLOCKED_VAL) return true; |