Skip unlocking page if fail to lock, then lock and unlock are paired.
Signed-off-by: Hillf Danton <dhillf@xxxxxxxxx>
---
--- a/mm/migrate.c Fri Nov 25 20:11:14 2011
+++ b/mm/migrate.c Fri Nov 25 20:21:26 2011
@@ -869,9 +869,9 @@ static int unmap_and_move_huge_page(new_
if (anon_vma)
put_anon_vma(anon_vma);
-out:
unlock_page(hpage);
+out:
if (rc != -EAGAIN) {
list_del(&hpage->lru);
put_page(hpage);
--
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