cls_cgroup: Fix crash on module unload

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@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c
index 37dff78e9cb17c6fcf35e5302d57b84dd5e9f5f9..d49c40fb7e0960daa905353e714e9317dd38088b 100644 (file)
--- a/net/sched/cls_cgroup.c
+++ b/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,
 };