linux-kernel - [PATCH] mm/rmap: fix obsolete comment in __page_check_anon

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Message-ID: <20210128110209.50857-1-linmiaohe@huawei.com>
Date:   Thu, 28 Jan 2021 06:02:09 -0500
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] mm/rmap: fix obsolete comment in __page_check_anon_rmap()

Commit 21333b2b66b8 ("ksm: no debug in page_dup_rmap()") has reverted
page_dup_rmap() to an inline atomic_inc of mapcount. So page_dup_rmap()
does not call __page_check_anon_rmap() anymore.

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

diff --git a/mm/rmap.c b/mm/rmap.c
index 46fdbf541b8e..c3f6e060d73f 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1086,8 +1086,7 @@ static void __page_check_anon_rmap(struct page *page,
 	 * be set up correctly at this point.
 	 *
 	 * We have exclusion against page_add_anon_rmap because the caller
-	 * always holds the page locked, except if called from page_dup_rmap,
-	 * in which case the page is already known to be setup.
+	 * always holds the page locked.
 	 *
 	 * We have exclusion against page_add_new_anon_rmap because those pages
 	 * are initially only visible via the pagetables, and the pte is locked
-- 
2.19.1