From: Wei Yang <richard.weiyang@gmail.com>
To: akpm@linux-foundation.org
Cc: linux-mm@kvack.org, Wei Yang <richard.weiyang@gmail.com>
Subject: [PATCH 1/2] mm/mlock: not handle NULL vma specially
Date: Wed, 4 May 2022 00:39:57 +0000 [thread overview]
Message-ID: <20220504003958.18402-1-richard.weiyang@gmail.com> (raw)
If we can't find a proper vma, the loop would terminate as expected.
It's not necessary to handle it specially.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
---
mm/mlock.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/mm/mlock.c b/mm/mlock.c
index efd2dd2943de..0b7cf7d60922 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -504,11 +504,7 @@ static unsigned long count_mm_mlocked_page_nr(struct mm_struct *mm,
if (mm == NULL)
mm = current->mm;
- vma = find_vma(mm, start);
- if (vma == NULL)
- return 0;
-
- for (; vma ; vma = vma->vm_next) {
+ for (vma = find_vma(mm, start); vma ; vma = vma->vm_next) {
if (start >= vma->vm_end)
continue;
if (start + len <= vma->vm_start)
--
2.33.1
next reply other threads:[~2022-05-04 0:40 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-04 0:39 Wei Yang [this message]
2022-05-04 0:39 ` [PATCH 2/2] mm/mlock: start is always smaller then vm_end Wei Yang
2022-05-07 21:03 ` [PATCH 1/2] mm/mlock: not handle NULL vma specially Andrew Morton
2022-05-07 21:56 ` Wei Yang
2022-05-07 22:44 ` Andrew Morton
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