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authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-24 17:47:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-24 17:47:44 -0700
commit614a6d4341b3760ca98a1c2c09141b71db5d1e90 (patch)
tree6345a6fe908e002f2bd6056427d49b2d0e5652a5 /include
parenta08489c569dc174cff97d2cb165aa81e3f1501cc (diff)
parent9a8054aa5d7a98106f72d9ab76e26ebd42320ee0 (diff)
downloadlinux-614a6d4341b3760ca98a1c2c09141b71db5d1e90.tar.bz2
Merge branch 'for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
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
Diffstat (limited to 'include')
-rw-r--r--include/linux/cgroup.h17
1 files changed, 2 insertions, 15 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index d3f5fba2c159..c90eaa803440 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -500,21 +500,8 @@ struct cgroup_subsys {
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.
*/