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cgroup: remove for_each_root_subsys()

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After the previous patch which introduced for_each_css(),
for_each_root_subsys() only has two users left.  This patch replaces
it with for_each_subsys() + explicit subsys_mask testing and remove
for_each_root_subsys() along with cgroupfs_root->subsys_list handling.

This patch doesn't introduce any behavior changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
This commit is contained in:
Tejun Heo 2013-12-06 15:11:57 -05:00
commit b85d20404c
2 changed files with 16 additions and 30 deletions
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9
include/linux/cgroup.h
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@ -319,9 +319,6 @@ struct cgroupfs_root {
/* Unique id for this hierarchy. */
int hierarchy_id;
/* A list running through the attached subsystems */
struct list_head subsys_list;
/* The root cgroup for this hierarchy */
struct cgroup top_cgroup;
@ -617,12 +614,8 @@ struct cgroup_subsys {
#define MAX_CGROUP_TYPE_NAMELEN 32
const char *name;
/*
* Link to parent, and list entry in parent's children.
* Protected by cgroup_lock()
*/
/* link to parent, protected by cgroup_lock() */
struct cgroupfs_root *root;
struct list_head sibling;
/* list of cftype_sets */
struct list_head cftsets;