Merge branch 'for-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

Pull cgroup changes from Tejun Heo:
 "Nothing too drastic.

   - Removal of synchronize_rcu() from userland visible paths.

   - Various fixes and cleanups from Li.

   - cgroup_rightmost_descendant() added which will be used by cpuset
     changes (it will be a separate pull request)."

* 'for-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: fail if monitored file and event_control are in different cgroup
  cgroup: fix cgroup_rmdir() vs close(eventfd) race
  cpuset: fix cpuset_print_task_mems_allowed() vs rename() race
  cgroup: fix exit() vs rmdir() race
  cgroup: remove bogus comments in cgroup_diput()
  cgroup: remove synchronize_rcu() from cgroup_diput()
  cgroup: remove duplicate RCU free on struct cgroup
  sched: remove redundant NULL cgroup check in task_group_path()
  sched: split out css_online/css_offline from tg creation/destruction
  cgroup: initialize cgrp->dentry before css_alloc()
  cgroup: remove a NULL check in cgroup_exit()
  cgroup: fix bogus kernel warnings when cgroup_create() failed
  cgroup: remove synchronize_rcu() from rebind_subsystems()
  cgroup: remove synchronize_rcu() from cgroup_attach_{task|proc}()
  cgroup: use new hashtable implementation
  cgroups: fix cgroup_event_listener error handling
  cgroups: move cgroup_event_listener.c to tools/cgroup
  cgroup: implement cgroup_rightmost_descendant()
  cgroup: remove unused dummy cgroup_fork_callbacks()

1 files changed, 0 insertions, 7 deletions

diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 7ae4c4c5420e..557e7b53b323 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -110,13 +110,6 @@ static char *task_group_path(struct task_group *tg)
         if (autogroup_path(tg, group_path, PATH_MAX))
                 return group_path;
 
-        /*
-         * May be NULL if the underlying cgroup isn't fully-created yet
-         */
-        if (!tg->css.cgroup) {
-                group_path[0] = '\0';
-                return group_path;
-        }
         cgroup_path(tg->css.cgroup, group_path, PATH_MAX);
         return group_path;
 }