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-rw-r--r--net/sched/cls_cgroup.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c
index 5ee72a001df0..af412ab2b477 100644
--- a/net/sched/cls_cgroup.c
+++ b/net/sched/cls_cgroup.c
@@ -23,16 +23,19 @@
#include <net/sock.h>
#include <net/cls_cgroup.h>
+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;
+}
+
static inline struct cgroup_cls_state *cgrp_cls_state(struct cgroup *cgrp)
{
- return container_of(cgroup_css(cgrp, net_cls_subsys_id),
- struct cgroup_cls_state, css);
+ return css_cls_state(cgroup_css(cgrp, net_cls_subsys_id));
}
static inline struct cgroup_cls_state *task_cls_state(struct task_struct *p)
{
- return container_of(task_css(p, net_cls_subsys_id),
- struct cgroup_cls_state, css);
+ return css_cls_state(task_css(p, net_cls_subsys_id));
}
static struct cgroup_subsys_state *cgrp_css_alloc(struct cgroup *cgrp)