diff options
Diffstat (limited to 'kernel/cgroup.c')
| -rw-r--r-- | kernel/cgroup.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 75c0ff00aca6..33a2f63d4a10 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -61,7 +61,6 @@ #include <linux/cpuset.h> #include <linux/proc_ns.h> #include <linux/nsproxy.h> -#include <linux/proc_ns.h> #include <net/sock.h> /* @@ -1160,18 +1159,12 @@ static void cgroup_exit_root_id(struct cgroup_root *root) { lockdep_assert_held(&cgroup_mutex); - if (root->hierarchy_id) { - idr_remove(&cgroup_hierarchy_idr, root->hierarchy_id); - root->hierarchy_id = 0; - } + idr_remove(&cgroup_hierarchy_idr, root->hierarchy_id); } static void cgroup_free_root(struct cgroup_root *root) { if (root) { - /* hierarchy ID should already have been released */ - WARN_ON_ONCE(root->hierarchy_id); - idr_destroy(&root->cgroup_idr); kfree(root); } @@ -5146,6 +5139,8 @@ static struct cgroup_subsys_state *css_create(struct cgroup *cgrp, lockdep_assert_held(&cgroup_mutex); css = ss->css_alloc(parent_css); + if (!css) + css = ERR_PTR(-ENOMEM); if (IS_ERR(css)) return css; @@ -6172,7 +6167,7 @@ struct cgroup_subsys_state *css_tryget_online_from_dir(struct dentry *dentry, struct cgroup_subsys_state *css_from_id(int id, struct cgroup_subsys *ss) { WARN_ON_ONCE(!rcu_read_lock_held()); - return id > 0 ? idr_find(&ss->css_idr, id) : NULL; + return idr_find(&ss->css_idr, id); } /** |