cgroup: introduce cgroup->subtree_control

[linux-beck.git] / include / linux / cgroup.h

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 8a111dd42d7aea1764f55abd385ab149fcd196f1..8d52c8e5b510a9ccab4eafbcf8ed3721734e2a8d 100644 (file)
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -203,7 +203,13 @@ struct cgroup {
        struct kernfs_node *kn;         /* cgroup kernfs entry */
        struct kernfs_node *populated_kn; /* kn for "cgroup.subtree_populated" */
 
-       /* the bitmask of subsystems enabled on the child cgroups */
+       /*
+        * The bitmask of subsystems enabled on the child cgroups.
+        * ->subtree_control is the one configured through
+        * "cgroup.subtree_control" while ->child_subsys_mask is the
+        * effective one which may have more subsystems enabled.
+        */
+       unsigned int subtree_control;
        unsigned int child_subsys_mask;
 
        /* Private pointers for each registered subsystem */