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blkcg: change a spin_lock() to spin_lock_irq() 

Smatch complains that we re-enable IRQs twice.  It looks like we forgot
to disable them here on the spin_trylock() failure path.  This was added
in 9f13ef678e "blkcg: use double locking instead of RCU for blkg
synchronization".

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>`
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Dan Carpenter 2012-03-29 20:57:08 +02:00 committed by Jens Axboe
parent eb7d8c07f9
commit a5567932fc
1 changed files with 1 additions and 1 deletions
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2
block/blk-cgroup.c
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@ -1601,7 +1601,7 @@ static int blkiocg_pre_destroy(struct cgroup_subsys *subsys,
} else {
spin_unlock_irq(&blkcg->lock);
cpu_relax();
spin_lock(&blkcg->lock);
spin_lock_irq(&blkcg->lock);
}
}