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pagewalk: fix code comment for THP
Commit bae9c19bf1
("thp: split_huge_page_mm/vma") changed locking behavior
of walk_page_range(). Thus this patch changes the comment too.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Hiroyuki Kamezawa <kamezawa.hiroyuki@gmail.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -176,7 +176,8 @@ static int walk_hugetlb_range(struct vm_area_struct *vma,
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* associated range, and a copy of the original mm_walk for access to
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* the ->private or ->mm fields.
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*
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* No locks are taken, but the bottom level iterator will map PTE
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* Usually no locks are taken, but splitting transparent huge page may
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* take page table lock. And the bottom level iterator will map PTE
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* directories from highmem if necessary.
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*
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* If any callback returns a non-zero value, the walk is aborted and
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