MD: fix warnning for UP case

shligit · shligit · commit ed9b66d21866 · 2017-07-25T15:18:13.000-07:00
spin_is_locked always returns 0 for UP case, so ignores it

Reported-by: Joshua Kinard &lt;kumba@gentoo.org&gt;
Signed-off-by: Shaohua Li &lt;shli@fb.com&gt;
diff --git 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);

Original file line number	Diff line number	Diff line change
`@@ -2287,7 +2287,7 @@ static void export_array(struct mddev *mddev)`
`2287`	`2287`
`2288`	`2288`	`static bool set_in_sync(struct mddev *mddev)`
`2289`	`2289`	`{`
`2290`		`- WARN_ON_ONCE(!spin_is_locked(&mddev->lock));`
	`2290`	`+ WARN_ON_ONCE(NR_CPUS != 1 && !spin_is_locked(&mddev->lock));`
`2291`	`2291`	`if (!mddev->in_sync) {`
`2292`	`2292`	`mddev->sync_checkers++;`
`2293`	`2293`	`spin_unlock(&mddev->lock);`