[PATCH] memcg: mem_cgroup_shrink_usage css_put

[Hugh Dickins]

mem_cgroup_shrink_usage makes no charge: balance its css_get with a css_put.

Signed-off-by: Hugh Dickins <hugh@xxxxxxxxxxx>
---
Should follow mmotm's memcg-helper-function-for-relcaim-from-shmem.patch

 mm/memcontrol.c |    1 +
 1 file changed, 1 insertion(+)

--- mmotm/mm/memcontrol.c	2008-06-27 13:39:20.000000000 +0100
+++ linux/mm/memcontrol.c	2008-06-27 17:32:29.000000000 +0100
@@ -801,6 +801,7 @@ int mem_cgroup_shrink_usage(struct mm_st
 		progress = try_to_free_mem_cgroup_pages(mem, gfp_mask);
 	} while (!progress && --retry);
 
+	css_put(&mem->css);
 	if (!retry)
 		return -ENOMEM;
 	return 0;
--
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