linux-kernel - [PATCH v3 2/5] mm/migrate.c: remove unnecessary rc != MIGRATEPAGE

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Message-ID: <20210325131524.48181-3-linmiaohe@huawei.com>
Date:   Thu, 25 Mar 2021 09:15:21 -0400
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <jglisse@...hat.com>, <shy828301@...il.com>, <aquini@...hat.com>,
        <david@...hat.com>, <apopple@...dia.com>,
        <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH v3 2/5] mm/migrate.c: remove unnecessary rc != MIGRATEPAGE_SUCCESS check in 'else' case

It's guaranteed that in the 'else' case of the rc == MIGRATEPAGE_SUCCESS
check, rc does not equal to MIGRATEPAGE_SUCCESS. Remove this unnecessary
check.

Reviewed-by: David Hildenbrand <david@...hat.com>
Reviewed-by: Yang Shi <shy828301@...il.com>
Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 mm/migrate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 61e7f848b554..dacbdc9710ac 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1370,7 +1370,7 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
 out:
 	if (rc == MIGRATEPAGE_SUCCESS)
 		putback_active_hugepage(hpage);
-	else if (rc != -EAGAIN && rc != MIGRATEPAGE_SUCCESS)
+	else if (rc != -EAGAIN)
 		list_move_tail(&hpage->lru, ret);
 
 	/*
-- 
2.19.1