From 5563e77078d85c4f107a0a673500c43ce57cf702 Mon Sep 17 00:00:00 2001
From: Bob Picco <bob.picco@hp.com>
Date: Sun, 13 Nov 2005 16:06:35 -0800
Subject: [PATCH] [PATCH] cpuset: fix return without releasing semaphore

It is wrong to acquire the semaphore and then return from
cpuset_zone_allowed without releasing it.

Signed-off-by: Bob Picco <bob.picco@hp.com>
Acked-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 kernel/cpuset.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 5a737ed9dac..7430640f981 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1809,11 +1809,12 @@ int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask)
 	if (gfp_mask & __GFP_HARDWALL)	/* If hardwall request, stop here */
 		return 0;
 
+	if (current->flags & PF_EXITING) /* Let dying task have memory */
+		return 1;
+
 	/* Not hardwall and node outside mems_allowed: scan up cpusets */
 	down(&callback_sem);
 
-	if (current->flags & PF_EXITING) /* Let dying task have memory */
-		return 1;
 	task_lock(current);
 	cs = nearest_exclusive_ancestor(current->cpuset);
 	task_unlock(current);