From: Liam Howlett <liam.howlett@oracle.com>
To: "linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH] remap_file_pages: Use vma_lookup() instead of find_vma()
Date: Tue, 17 Aug 2021 13:52:49 +0000 [thread overview]
Message-ID: <20210817135234.1550204-1-Liam.Howlett@oracle.com> (raw)
From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>
Using vma_lookup() verifies the start address is contained in the found vma.
This results in easier to read code.
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
mm/mmap.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index d9aa54be6244..1a23d4575cc4 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2994,14 +2994,11 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
if (mmap_write_lock_killable(mm))
return -EINTR;
- vma = find_vma(mm, start);
+ vma = vma_lookup(mm, start);
if (!vma || !(vma->vm_flags & VM_SHARED))
goto out;
- if (start < vma->vm_start)
- goto out;
-
if (start + size > vma->vm_end) {
struct vm_area_struct *next;
--
2.30.2
next reply other threads:[~2021-08-17 13:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-17 13:52 Liam Howlett [this message]
2021-08-17 14:03 ` [PATCH] remap_file_pages: Use vma_lookup() instead of find_vma() David Hildenbrand
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