linux-kernel - [PATCH] mm/madvise: Use vma_lookup() instead of find

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Message-ID: <20220311082731.63513-1-linmiaohe@huawei.com>
Date:   Fri, 11 Mar 2022 16:27:31 +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] mm/madvise: Use vma_lookup() instead of find_vma()

Using vma_lookup() verifies the start address is contained in the found
vma. This results in easier to read the code.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 mm/madvise.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/madvise.c b/mm/madvise.c
index 5b6d796e55de..afd68bfc77d4 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -883,8 +883,8 @@ static long madvise_populate(struct vm_area_struct *vma,
 		 * our VMA might have been split.
 		 */
 		if (!vma || start >= vma->vm_end) {
-			vma = find_vma(mm, start);
-			if (!vma || start < vma->vm_start)
+			vma = vma_lookup(mm, start);
+			if (!vma)
 				return -ENOMEM;
 		}
 
-- 
2.23.0