[PATCH v2 03/10] mm: remove SWAP_MLOCK check for SWAP_SUCCESS in ttu

[Minchan Kim]

If the page is mapped and rescue in try_to_unmap_one,
page_mapcount(page) == 0 cannot be true so page_mapcount check
in try_to_unmap is enough to return SWAP_SUCCESS.
IOW, SWAP_MLOCK check is redundant so remove it.

Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>
---
 mm/rmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/rmap.c b/mm/rmap.c
index e692cb5..bdc7310 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1530,7 +1530,7 @@ int try_to_unmap(struct page *page, enum ttu_flags flags)
 	else
 		ret = rmap_walk(page, &rwc);
 
-	if (ret != SWAP_MLOCK && !page_mapcount(page))
+	if (!page_mapcount(page))
 		ret = SWAP_SUCCESS;
 	return ret;
 }
-- 
2.7.4