From: Gavin Shan <[email protected]>

Date: Thu, 18 Apr 2013 22:23:27 +0900
Subject: [PATCH 3.8-stable] mm/vmscan: fix error return in kswapd_run()

This patch looks like it should be in the 3.8-stable tree, should we apply
it?

------------------

From: "Gavin Shan <[email protected]>"

commit d5dc0ad928fb9e972001e552597fd0b794863f34 upstream

Fix the error return value in kswapd_run().  The bug was introduced by
commit d5dc0ad928fb ("mm/vmscan: fix error number for failed kthread").

Signed-off-by: Xishi Qiu <[email protected]>
Reviewed-by: Wanpeng Li <[email protected]>
Reviewed-by: Rik van Riel <[email protected]>
Reported-by: Wu Fengguang <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Jonghwan Choi <[email protected]>
---
 mm/vmscan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 196709f..8226b41 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3158,9 +3158,9 @@ int kswapd_run(int nid)
        if (IS_ERR(pgdat->kswapd)) {
                /* failure at boot is fatal */
                BUG_ON(system_state == SYSTEM_BOOTING);
-               pgdat->kswapd = NULL;
                pr_err("Failed to start kswapd on node %d\n", nid);
                ret = PTR_ERR(pgdat->kswapd);
+               pgdat->kswapd = NULL;
        }
        return ret;
 }
-- 
1.7.10.4

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