[PATCH] mm/vmscan: fix comment for current_may_throttle

[Miaohe Lin <linmiaohe@huawei.com>]

Since commit 6d6435811c19 ("remove bdi_congested() and wb_congested() and
related functions"), there is no congested backing device check anymore.
Correct the comment accordingly.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
 mm/vmscan.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index d4a7d2bd276d..6f96cf1eacb2 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2334,8 +2334,7 @@ static unsigned int move_pages_to_lru(struct lruvec *lruvec,
 /*
  * If a kernel thread (such as nfsd for loop-back mounts) services
  * a backing device by writing to the page cache it sets PF_LOCAL_THROTTLE.
- * In that case we should only throttle if the backing device it is
- * writing to is congested.  In other cases it is safe to throttle.
+ * In that case we should not throttle it otherwise it is safe to do so.
  */
 static int current_may_throttle(void)
 {
-- 
2.23.0