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huge mm: move_huge_pmd does not need new_vma

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Remove move_huge_pmd()'s redundant new_vma arg: all it was used for was
a VM_NOHUGEPAGE check on new_vma flags, but the new_vma is cloned from
the old vma, so a trans_huge_pmd in the new_vma will be as acceptable as
it was in the old vma, alignment and size permitting.

Signed-off-by: Hugh Dickins <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: Andres Lagar-Cavilla <[email protected]>
Cc: Yang Shi <[email protected]>
Cc: Ning Qu <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Andres Lagar-Cavilla <[email protected]>
Cc: Konstantin Khlebnikov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Hugh Dickins 2016-05-19 17:12:54 -07:00 • committed by Linus Torvalds
commit bf8616d5fa
3 changed files with 5 additions and 11 deletions
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5
mm/mremap.c
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@ -198,9 +198,8 @@ unsigned long move_page_tables(struct vm_area_struct *vma,
/* See comment in move_ptes() */
if (need_rmap_locks)
anon_vma_lock_write(vma->anon_vma);
moved = move_huge_pmd(vma, new_vma, old_addr,
new_addr, old_end,
old_pmd, new_pmd);
moved = move_huge_pmd(vma, old_addr, new_addr,
old_end, old_pmd, new_pmd);
if (need_rmap_locks)
anon_vma_unlock_write(vma->anon_vma);
if (moved) {