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Merge branch 'for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

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Pull cgroup changes from Tejun Heo:
 "Nothing too interesting.  A minor bug fix and some cleanups."

* 'for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: Update remount documentation
  cgroup: cgroup_rm_files() was calling simple_unlink() with the wrong inode
  cgroup: Remove populate() documentation
  cgroup: remove hierarchy_mutex
This commit is contained in:
Linus Torvalds 2012-07-24 17:47:44 -07:00
commit 614a6d4341
3 changed files with 10 additions and 81 deletions
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17
include/linux/cgroup.h
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@ -499,22 +499,9 @@ struct cgroup_subsys {
#define MAX_CGROUP_TYPE_NAMELEN 32
const char *name;
/*
* Protects sibling/children links of cgroups in this
* hierarchy, plus protects which hierarchy (or none) the
* subsystem is a part of (i.e. root/sibling). To avoid
* potential deadlocks, the following operations should not be
* undertaken while holding any hierarchy_mutex:
*
* - allocating memory
* - initiating hotplug events
*/
struct mutex hierarchy_mutex;
struct lock_class_key subsys_key;
/*
* Link to parent, and list entry in parent's children.
* Protected by this->hierarchy_mutex and cgroup_lock()
* Protected by cgroup_lock()
*/
struct cgroupfs_root *root;
struct list_head sibling;
@ -602,7 +589,7 @@ int cgroup_attach_task_all(struct task_struct *from, struct task_struct *);
* the lifetime of cgroup_subsys_state is subsys's matter.
*
* Looking up and scanning function should be called under rcu_read_lock().
* Taking cgroup_mutex()/hierarchy_mutex() is not necessary for following calls.
* Taking cgroup_mutex is not necessary for following calls.
* But the css returned by this routine can be "not populated yet" or "being
* destroyed". The caller should check css and cgroup's status.
*/