1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 8cdca0296749..c99634612fc4 100644
--- 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);