From: Shaohua Li <shli@fb.com>
Date: Tue, 25 Jul 2017 22:18:13 +0000 (-0700)
Subject: MD: fix warnning for UP case
X-Git-Tag: v4.13-rc3~14^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ed9b66d21866ae3bf16557406258ebe6c00a9a84;p=thirdparty%2Flinux.git

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 8cdca02967497..c99634612fc40 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);