From: Miaohe Lin <linmiaohe@huawei.com>
To: <akpm@linux-foundation.org>, <hughd@google.com>
Cc: <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
<linmiaohe@huawei.com>
Subject: [PATCH] mm/mlock: remove unneeded start >= vma->vm_end check
Date: Mon, 14 Mar 2022 23:32:23 +0800 [thread overview]
Message-ID: <20220314153223.53753-1-linmiaohe@huawei.com> (raw)
If find_vma returns a vma, it must satisfies that start < vma->vm_end.
Since vma list is sorted in the ascending order, so we will never see
start >= vma->vm_end here. Remove this unneeded check.
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
mm/mlock.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/mm/mlock.c b/mm/mlock.c
index fefa9644d0f9..fe278634ebe3 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -509,8 +509,6 @@ static unsigned long count_mm_mlocked_page_nr(struct mm_struct *mm,
return 0;
for (; vma ; vma = vma->vm_next) {
- if (start >= vma->vm_end)
- continue;
if (start + len <= vma->vm_start)
break;
if (vma->vm_flags & VM_LOCKED) {
--
2.23.0
next reply other threads:[~2022-03-14 15:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-14 15:32 Miaohe Lin [this message]
2022-03-14 16:17 ` [PATCH] mm/mlock: remove unneeded start >= vma->vm_end check Matthew Wilcox
2022-03-15 12:30 ` Miaohe Lin
2022-03-31 1:50 ` Miaohe Lin
2022-04-06 9:17 ` Miaohe Lin
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