From: Deming Wang <wangdeming@inspur.com>
Date: Fri, 7 Oct 2022 03:03:45 +0000 (-0400)
Subject: mm/mincore.c: use vma_lookup() instead of find_vma()
X-Git-Tag: v6.6.7~3912^2~297
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=97955f6941f0e7dea64dea22711382daf1db2f76;p=platform%2Fkernel%2Flinux-starfive.git

mm/mincore.c: 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.

Link: https://lkml.kernel.org/r/20221007030345.5029-1-wangdeming@inspur.com
Signed-off-by: Deming Wang <wangdeming@inspur.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/mincore.c b/mm/mincore.c
index fa200c1..e7e046f 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)) {