mm/hugetlb: remove unnecessary huge_ptep_set_access_flags() in hugetlb_mcopy_atomic_pte()

There is no need to update the hugetlb access flags after just setting the
hugetlb page table entry by set_huge_pte_at(), since the page table entry
value has no changes.

Thus remove the unnecessary huge_ptep_set_access_flags() in
hugetlb_mcopy_atomic_pte().

Link: https://lkml.kernel.org/r/f3e28b897b53a69967a8b98a6fdcda3be80c9229.1653616175.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index ed202d2..70d2763 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -6039,8 +6039,6 @@ int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm,
 
        set_huge_pte_at(dst_mm, dst_addr, dst_pte, _dst_pte);
 
-       (void)huge_ptep_set_access_flags(dst_vma, dst_addr, dst_pte, _dst_pte,
-                                       dst_vma->vm_flags & VM_WRITE);
        hugetlb_count_add(pages_per_huge_page(h), dst_mm);
 
        /* No need to invalidate - it was non-present before */