Commit 686ea6e6 authored by ZhangPeng's avatar ZhangPeng Committed by Andrew Morton
Browse files

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: default avatarZhangPeng <zhangpeng362@huawei.com>
Reviewed-by: default avatarDavid 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: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 13215e8a

mm/userfaultfd.c

+1 −5
Original line number Diff line number Diff line
@@ -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;



	/*