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mm/migrate.c: pair unlock_page() and lock_page() when migrating huge pages 

Avoid unlocking and unlocked page if we failed to lock it.

Signed-off-by: Hillf Danton <dhillf@gmail.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hillf Danton 2011-12-08 14:34:20 -08:00 committed by Linus Torvalds
parent 58a84aa927
commit 09761333ed
1 changed files with 1 additions and 1 deletions
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2
mm/migrate.c
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@ -871,9 +871,9 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
if (anon_vma) if (anon_vma)
put_anon_vma(anon_vma); put_anon_vma(anon_vma);
out:
unlock_page(hpage); unlock_page(hpage);
out:
if (rc != -EAGAIN) { if (rc != -EAGAIN) {
list_del(&hpage->lru); list_del(&hpage->lru);
put_page(hpage); put_page(hpage);