[PATCH 2/3] mm/mlock: remove __munlock_isolate_lru_page

[Alex Shi]

The func only has one caller, remove it to clean up code and simplify
code.

Signed-off-by: Alex Shi <alex.shi@xxxxxxxxxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
 mm/mlock.c | 22 ++++------------------
 1 file changed, 4 insertions(+), 18 deletions(-)

diff --git a/mm/mlock.c b/mm/mlock.c
index 46a05e6ec5ba..40a8bb79c65e 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -102,23 +102,6 @@ void mlock_vma_page(struct page *page)
 }
 
 /*
- * Isolate a page from LRU with optional get_page() pin.
- * Assumes lru_lock already held and page already pinned.
- */
-static bool __munlock_isolate_lru_page(struct page *page,
-				struct lruvec *lruvec, bool getpage)
-{
-	if (TestClearPageLRU(page)) {
-		if (getpage)
-			get_page(page);
-		del_page_from_lru_list(page, lruvec, page_lru(page));
-		return true;
-	}
-
-	return false;
-}
-
-/*
  * Finish munlock after successful page isolation
  *
  * Page must be locked. This is a wrapper for try_to_munlock()
@@ -300,7 +283,10 @@ static void __munlock_pagevec(struct pagevec *pvec, struct zone *zone)
 			 * We already have pin from follow_page_mask()
 			 * so we can spare the get_page() here.
 			 */
-			if (__munlock_isolate_lru_page(page, lruvec, false)) {
+			if (TestClearPageLRU(page)) {
+				enum lru_list lru = page_lru(page);
+
+				del_page_from_lru_list(page, lruvec, lru);
 				unlock_page_memcg(page);
 				continue;
 			} else
-- 
1.8.3.1