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authorZhangPeng <zhangpeng362@huawei.com>2023-04-17 08:39:19 +0800
committerAndrew Morton <akpm@linux-foundation.org>2023-04-21 14:52:02 -0700
commit686ea6e61da61e46ae7068f73167ca26e0c67efb (patch)
tree67b39532bad3c68d081dda8a41c82e0832b5bc65
parent13215e8a4bb336dac2af561d4f5c34a071810ee4 (diff)
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userfaultfd: use helper function range_in_vma()
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@huawei.com Signed-off-by: ZhangPeng <zhangpeng362@huawei.com> Reviewed-by: David Hildenbrand <david@redhat.com> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Nanyong Sun <sunnanyong@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
-rw-r--r--mm/userfaultfd.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c
index 11cfd82c6726..e97a0b4889fc 100644
--- a/mm/userfaultfd.c
+++ b/mm/userfaultfd.c
@@ -31,11 +31,7 @@ struct vm_area_struct *find_dst_vma(struct mm_struct *dst_mm,
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;
/*