[PATCH] mempolicy: add missed spin_unlock in queue_pages_pte_range

["Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>]

We forgot to unlock ptl in case when huge pmd dissappered under us.

This patch can be folded into
  "migrate_pages: try to split pages on queuing"

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
 mm/mempolicy.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 496214bd82e2..973434eff9dc 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -510,6 +510,8 @@ static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr,
 				if (ret)
 					return 0;
 			}
+		} else {
+			spin_unlock(ptl);
 		}
 	}
 
-- 
2.6.4

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