[161/227] mm/madvise: use vma_lookup() instead of find_vma()

Commit Message

Andrew Morton March 22, 2022, 9:46 p.m. UTC

From: Miaohe Lin <[e-mail]>
Subject: 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.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Miaohe Lin <[e-mail]>
Reviewed-by: David Hildenbrand <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 mm/madvise.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

--- a/mm/madvise.c~mm-madvise-use-vma_lookup-instead-of-find_vma
+++ a/mm/madvise.c
@@ -849,8 +849,8 @@  static long madvise_populate(struct vm_a
 		 * 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;
 		}