[PATCH] [64/139] cls_cgroup: Fix crash on module unload

[Andi Kleen]

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

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

From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>

[ Upstream commit c00b2c9e79466d61979cd21af526cc6d5d0ee04f ]

Somewhere along the lines net_cls_subsys_id became a macro when
cls_cgroup is built as a module.  Not only did it make cls_cgroup
completely useless, it also causes it to crash on module unload.

This patch fixes this by removing that macro.

Thanks to Eric Dumazet for diagnosing this problem.

Reported-by: Randy Dunlap <randy.dunlap@xxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Reviewed-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
 net/sched/cls_cgroup.c |    2 --
 1 file changed, 2 deletions(-)

Index: linux-2.6.35.y/net/sched/cls_cgroup.c
===================================================================
--- linux-2.6.35.y.orig/net/sched/cls_cgroup.c
+++ linux-2.6.35.y/net/sched/cls_cgroup.c
@@ -34,8 +34,6 @@ struct cgroup_subsys net_cls_subsys = {
 	.populate	= cgrp_populate,
 #ifdef CONFIG_NET_CLS_CGROUP
 	.subsys_id	= net_cls_subsys_id,
-#else
-#define net_cls_subsys_id net_cls_subsys.subsys_id
 #endif
 	.module		= THIS_MODULE,
 };
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