linux-kernel - [PATCH] mm: use vma_lookup() instead of find

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Date:   Thu, 6 Oct 2022 23:03:45 -0400
From:   Deming Wang <wangdeming@...pur.com>
To:     <akpm@...ux-foundation.org>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        Deming Wang <wangdeming@...pur.com>
Subject: [PATCH] mm: 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: Deming Wang <wangdeming@...pur.com>
---
 mm/mincore.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/mincore.c b/mm/mincore.c
index fa200c14185f..e7e046fe17d7 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -190,8 +190,8 @@ static long do_mincore(unsigned long addr, unsigned long pages, unsigned char *v
 	unsigned long end;
 	int err;
 
-	vma = find_vma(current->mm, addr);
-	if (!vma || addr < vma->vm_start)
+	vma = vma_lookup(current->mm, addr);
+	if (!vma)
 		return -ENOMEM;
 	end = min(vma->vm_end, addr + (pages << PAGE_SHIFT));
 	if (!can_do_mincore(vma)) {
-- 
2.27.0