mm/hugetlb: use helper function range_in_vma() in page_table_shareable()

We could use helper function range_in_vma() to check whether the vma is in
the desired range to simplify the code.

Link: https://lkml.kernel.org/r/20210204112949.43051-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 9d3a141..4c956e6 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -5282,7 +5282,7 @@ static unsigned long page_table_shareable(struct vm_area_struct *svma,
         */
        if (pmd_index(addr) != pmd_index(saddr) ||
            vm_flags != svm_flags ||
-           sbase < svma->vm_start || svma->vm_end < s_end)
+           !range_in_vma(svma, sbase, s_end))
                return 0;
 
        return saddr;