[PATCH] net: net_cls: remove a NULL check for css_cls_state

[Li RongQing]

The input of css_cls_state() is impossible to NULL except
cgrp_css_online, so simplify it

Signed-off-by: Li RongQing <lirongq...@baidu.com>
---
 net/core/netclassid_cgroup.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/net/core/netclassid_cgroup.c b/net/core/netclassid_cgroup.c
index 5e4f04004a49..ee087cf793c2 100644
--- a/net/core/netclassid_cgroup.c
+++ b/net/core/netclassid_cgroup.c
@@ -19,7 +19,7 @@
 
 static inline struct cgroup_cls_state *css_cls_state(struct 
cgroup_subsys_state *css)
 {
-       return css ? container_of(css, struct cgroup_cls_state, css) : NULL;
+       return container_of(css, struct cgroup_cls_state, css);
 }
 
 struct cgroup_cls_state *task_cls_state(struct task_struct *p)
@@ -44,10 +44,9 @@ cgrp_css_alloc(struct cgroup_subsys_state *parent_css)
 static int cgrp_css_online(struct cgroup_subsys_state *css)
 {
        struct cgroup_cls_state *cs = css_cls_state(css);
-       struct cgroup_cls_state *parent = css_cls_state(css->parent);
 
-       if (parent)
-               cs->classid = parent->classid;
+       if (css->parent)
+               cs->classid = css_cls_state(css->parent)->classid;
 
        return 0;
 }
-- 
2.11.0