diff options
| author | Nicholas Mc Guire <der.herr@hofr.at> | 2013-12-02 04:03:52 (GMT) |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-04-10 00:19:59 (GMT) |
| commit | e6e541ec2b28242ffd01f8641e18474b386e4473 (patch) | |
| tree | 99c8c2d3b1df71b289199b4429fd583425f6a880 | |
| parent | 0ce2cbb8fc86b080f134f3d976cd87e08ed7ebea (diff) | |
| download | linux-fsl-qoriq-e6e541ec2b28242ffd01f8641e18474b386e4473.tar.xz | |
seqlock: consolidate spin_lock/unlock waiting with spin_unlock_wait
since c2f21ce ("locking: Implement new raw_spinlock")
include/linux/spinlock.h includes spin_unlock_wait() to wait for a concurren
holder of a lock. this patch just moves over to that API. spin_unlock_wait
covers both raw_spinlock_t and spinlock_t so it should be safe here as well.
the added rt-variant of read_seqbegin in include/linux/seqlock.h that is being
modified, was introduced by patch:
seqlock-prevent-rt-starvation.patch
behavior should be unchanged.
Signed-off-by: Nicholas Mc Guire <der.herr@hofr.at>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
| -rw-r--r-- | include/linux/seqlock.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h index 142c0f7..019a936 100644 --- a/include/linux/seqlock.h +++ b/include/linux/seqlock.h @@ -236,8 +236,7 @@ repeat: * Take the lock and let the writer proceed (i.e. evtl * boost it), otherwise we could loop here forever. */ - spin_lock(&sl->lock); - spin_unlock(&sl->lock); + spin_unlock_wait(&sl->lock); goto repeat; } return ret; |