X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=include%2Fnet%2Fcls_cgroup.h;h=ef6c24a529e1a23188a27b60a0d6e73e84fb7003;hb=989cd445b48dc996426ab739d002ed504c5c43c9;hp=726cc353640988bd6fed9361f74cb8ef6dfbb9ce;hpb=1f73897861b8ef0be64ff4b801f8d6f830f683b5;p=karo-tx-linux.git

diff --git a/include/net/cls_cgroup.h b/include/net/cls_cgroup.h
index 726cc3536409..ef6c24a529e1 100644
--- a/include/net/cls_cgroup.h
+++ b/include/net/cls_cgroup.h
@@ -27,11 +27,17 @@ struct cgroup_cls_state
 #ifdef CONFIG_NET_CLS_CGROUP
 static inline u32 task_cls_classid(struct task_struct *p)
 {
+	int classid;
+
 	if (in_interrupt())
 		return 0;
 
-	return container_of(task_subsys_state(p, net_cls_subsys_id),
-			    struct cgroup_cls_state, css)->classid;
+	rcu_read_lock();
+	classid = container_of(task_subsys_state(p, net_cls_subsys_id),
+			       struct cgroup_cls_state, css)->classid;
+	rcu_read_unlock();
+
+	return classid;
 }
 #else
 extern int net_cls_subsys_id;