[PATCH] sched: fix struct autogroup memory leak

[Mike Galbraith <efault@gmx.de>]

Seems I lost a change somewhere, leaking memory.

sched: fix struct autogroup memory leak

Add missing change to actually use autogroup_free().

Signed-off-by: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>

---
 kernel/sched.c           |    1 +
 kernel/sched_autogroup.c |    3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

Index: linux-2.6/kernel/sched.c
===================================================================
--- linux-2.6.orig/kernel/sched.c
+++ linux-2.6/kernel/sched.c
@@ -8382,6 +8382,7 @@ static void free_sched_group(struct task
 {
 	free_fair_sched_group(tg);
 	free_rt_sched_group(tg);
+	autogroup_free(tg);
 	kfree(tg);
 }
 
Index: linux-2.6/kernel/sched_autogroup.c
===================================================================
--- linux-2.6.orig/kernel/sched_autogroup.c
+++ linux-2.6/kernel/sched_autogroup.c
@@ -20,7 +20,8 @@ static void autogroup_init(struct task_s
 
 static inline void autogroup_free(struct task_group *tg)
 {
-	kfree(tg->autogroup);
+	if (tg->autogroup)
+		kfree(tg->autogroup);
 }
 
 static inline void autogroup_destroy(struct kref *kref)