>From 19ac7e10b38947dbd8d731a13243fb28490f5ab4 Mon Sep 17 00:00:00 2001 From: Nicholas Mc Guire <der.herr@xxxxxxx> Date: Sun, 1 Dec 2013 23:03:52 -0500 Subject: [PATCH] consolidate spin_lock/unlock waiting with spin_unlock_wait since: commit c2f21ce2e31286a0a32f8da0a7856e9ca1122ef3 Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Date: Wed Dec 2 20:02:59 2009 +0100 include/linux/spinlock.h includes spin_unlock_wait() to wait for a concurrent 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 patch is on top of 3.12.1-rt4 behavior should be unchanged. Signed-off-by: Nicholas Mc Guire <der.herr@xxxxxxx> --- 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; -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
