diff options
| author | ZhangPeng <zhangpeng362@huawei.com> | 2023-04-17 08:39:19 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-04-21 14:52:02 -0700 |
| commit | 686ea6e61da61e46ae7068f73167ca26e0c67efb (patch) | |
| tree | 67b39532bad3c68d081dda8a41c82e0832b5bc65 /mm/userfaultfd.c | |
| parent | 13215e8a4bb336dac2af561d4f5c34a071810ee4 (diff) | |
| download | lwn-686ea6e61da61e46ae7068f73167ca26e0c67efb.tar.gz lwn-686ea6e61da61e46ae7068f73167ca26e0c67efb.zip | |
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>
Diffstat (limited to 'mm/userfaultfd.c')
| -rw-r--r-- | mm/userfaultfd.c | 6 |
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; /* |