From 9fb9623717dee26a32936b94a49c28832a1d711a Mon Sep 17 00:00:00 2001 From: Nicholas Mc Guire Date: Sun, 1 Dec 2013 23:03:52 -0500 Subject: 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 Signed-off-by: Sebastian Andrzej Siewior 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; -- cgit v0.10.2