watchdog: Improve initialisation error message and documentation

[pandora-kernel.git] / kernel / ns_cgroup.c

diff --git a/kernel/ns_cgroup.c b/kernel/ns_cgroup.c
index 2a5dfec..2c98ad9 100644 (file)
--- a/kernel/ns_cgroup.c
+++ b/kernel/ns_cgroup.c
@@ -85,6 +85,14 @@ static struct cgroup_subsys_state *ns_create(struct cgroup_subsys *ss,
                return ERR_PTR(-EPERM);
        if (!cgroup_is_descendant(cgroup, current))
                return ERR_PTR(-EPERM);
+       if (test_bit(CGRP_CLONE_CHILDREN, &cgroup->flags)) {
+               printk("ns_cgroup can't be created with parent "
+                      "'clone_children' set.\n");
+               return ERR_PTR(-EINVAL);
+       }
+
+       printk_once("ns_cgroup deprecated: consider using the "
+                   "'clone_children' flag without the ns_cgroup.\n");
 
        ns_cgroup = kzalloc(sizeof(*ns_cgroup), GFP_KERNEL);
        if (!ns_cgroup)