[PATCH] autonuma: release page_table_lock in scanning pmd

[Hillf Danton]

Only for unlikely corner case, unlock is added to pair lock.

Signed-off-by: Hillf Danton <dhillf@xxxxxxxxx>
---

--- a/mm/autonuma.c	Sat Mar 17 11:01:50 2012
+++ b/mm/autonuma.c	Tue Mar 20 19:58:44 2012
@@ -522,7 +522,8 @@ static int knumad_scan_pmd(struct mm_str
 				spin_unlock(&mm->page_table_lock);
 				goto out;
 			}
-		}
+		} else
+			spin_unlock(&mm->page_table_lock);
 	}

 	VM_BUG_ON(!pmd_present(*pmd));
--
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