[PATCH] mm: migration: pair unlock_page and lock_page when migratinghuge pages

[Hillf Danton]

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);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/