The patch titled
Subject: userfaultfd: use helper function range_in_vma()
has been added to the -mm mm-unstable branch. Its filename is
userfaultfd-use-helper-function-range_in_vma.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/userfaultfd-use-helper-function-range_in_vma.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: ZhangPeng <zhangpeng362@xxxxxxxxxx>
Subject: userfaultfd: use helper function range_in_vma()
Date: Mon, 17 Apr 2023 08:39:19 +0800
We can use range_in_vma() to check if dst_start, dst_start + len are
within the dst_vma range. Minor readability improvement.
Link: https://lkml.kernel.org/r/20230417003919.930515-1-zhangpeng362@xxxxxxxxxx
Signed-off-by: ZhangPeng <zhangpeng362@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Nanyong Sun <sunnanyong@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/userfaultfd.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
--- a/mm/userfaultfd.c~userfaultfd-use-helper-function-range_in_vma
+++ a/mm/userfaultfd.c
@@ -31,11 +31,7 @@ struct vm_area_struct *find_dst_vma(stru
struct vm_area_struct *dst_vma;
dst_vma = find_vma(dst_mm, dst_start);
- if (!dst_vma)
- return NULL;
-
- if (dst_start < dst_vma->vm_start ||
- dst_start + len > dst_vma->vm_end)
+ if (!range_in_vma(dst_vma, dst_start, dst_start + len))
return NULL;
/*
_
Patches currently in -mm which might be from zhangpeng362@xxxxxxxxxx are
mm-madvise-use-vma_lookup-instead-of-find_vma.patch
userfaultfd-convert-mfill_atomic_pte_copy-to-use-a-folio.patch
userfaultfd-use-kmap_local_page-in-copy_huge_page_from_user.patch
userfaultfd-convert-copy_huge_page_from_user-to-copy_folio_from_user.patch
userfaultfd-convert-mfill_atomic_hugetlb-to-use-a-folio.patch
mm-convert-copy_user_huge_page-to-copy_user_large_folio.patch
userfaultfd-convert-mfill_atomic-to-use-a-folio.patch
userfaultfd-use-helper-function-range_in_vma.patch
