Merge branch 'cgroup-rmdir-updates' into cgroup/for-3.8

Pull rmdir updates into for-3.8 so that further callback updates can
be put on top.  This pull created a trivial conflict between the
following two commits.

  8c7f6edbda ("cgroup: mark subsystems with broken hierarchy support and whine if cgroups are nested for them")
  ed95779340 ("cgroup: kill cgroup_subsys->__DEPRECATED_clear_css_refs")

The former added a field to cgroup_subsys and the latter removed one
from it.  They happen to be colocated causing the conflict.  Keeping
what's added and removing what's removed resolves the conflict.

Signed-off-by: Tejun Heo <tj@kernel.org>

diff --cc block/blk-cgroup.c
Simple merge

diff --cc include/linux/cgroup.h
index 4cd1d0fd2542c147f67413dbaec3d37e2f7f558a,adb2adc8ec1abd26e93fbddbcf25eed5cfb61b2b..fe876a77031adf5f8e1235ffb1c19a12cb978832
--- 1/include/linux/cgroup.h
--- 2/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@@ -487,32 -457,6 +459,21 @@@ struct cgroup_subsys 
         */
        bool use_id;
  
-       /*
-        * If %true, cgroup removal will try to clear css refs by retrying
-        * ss->pre_destroy() until there's no css ref left.  This behavior
-        * is strictly for backward compatibility and will be removed as
-        * soon as the current user (memcg) is updated.
-        *
-        * If %false, ss->pre_destroy() can't fail and cgroup removal won't
-        * wait for css refs to drop to zero before proceeding.
-        */
-       bool __DEPRECATED_clear_css_refs;
- 
 +      /*
 +       * If %false, this subsystem is properly hierarchical -
 +       * configuration, resource accounting and restriction on a parent
 +       * cgroup cover those of its children.  If %true, hierarchy support
 +       * is broken in some ways - some subsystems ignore hierarchy
 +       * completely while others are only implemented half-way.
 +       *
 +       * It's now disallowed to create nested cgroups if the subsystem is
 +       * broken and cgroup core will emit a warning message on such
 +       * cases.  Eventually, all subsystems will be made properly
 +       * hierarchical and this will go away.
 +       */
 +      bool broken_hierarchy;
 +      bool warned_broken_hierarchy;
 +
  #define MAX_CGROUP_TYPE_NAMELEN 32
        const char *name;
  

diff --cc kernel/cgroup.c
Simple merge

diff --cc mm/memcontrol.c
Simple merge