MD: fix warnning for UP case

spin_is_locked always returns 0 for UP case, so ignores it

Reported-by: Joshua Kinard <kumba@gentoo.org>
Signed-off-by: Shaohua Li <shli@fb.com>

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 8cdca029674975f2d365ef6d17aabbc684c33b8e..c99634612fc408fbc97df9c7c8ef8e028efe2fad 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2287,7 +2287,7 @@ static void export_array(struct mddev *mddev)
 
 static bool set_in_sync(struct mddev *mddev)
 {
-       WARN_ON_ONCE(!spin_is_locked(&mddev->lock));
+       WARN_ON_ONCE(NR_CPUS != 1 && !spin_is_locked(&mddev->lock));
        if (!mddev->in_sync) {
                mddev->sync_checkers++;
                spin_unlock(&mddev->lock);