linux-kernel - [PATCH 1/8] mm/vmscan: remove redundant folio_test

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Message-ID: <20220329132619.18689-2-linmiaohe@huawei.com>
Date:   Tue, 29 Mar 2022 21:26:12 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH 1/8] mm/vmscan: remove redundant folio_test_swapbacked check when folio is file lru

When folio is file lru, folio_test_swapbacked is guaranteed to be true. So
it's unnecessary to check it here again. No functional change intended.

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

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 1678802e03e7..7c1a9713bfc9 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1434,8 +1434,7 @@ static void folio_check_dirty_writeback(struct folio *folio,
 	 * Anonymous pages are not handled by flushers and must be written
 	 * from reclaim context. Do not stall reclaim based on them
 	 */
-	if (!folio_is_file_lru(folio) ||
-	    (folio_test_anon(folio) && !folio_test_swapbacked(folio))) {
+	if (!folio_is_file_lru(folio) || folio_test_anon(folio)) {
 		*dirty = false;
 		*writeback = false;
 		return;
-- 
2.23.0