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cgroup: rename cgroup_subsys->subsys_id to ->id

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It's no longer referenced outside cgroup core, so renaming is easy.
Let's rename it for consistency & brevity.

This patch is pure rename.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
This commit is contained in:
Tejun Heo 2014-02-08 10:36:58 -05:00
parent 073219e995
commit aec25020f5
2 changed files with 12 additions and 12 deletions
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4
include/linux/cgroup.h
View file

@ -548,7 +548,7 @@ int cgroup_taskset_size(struct cgroup_taskset *tset);
(task) = cgroup_taskset_next((tset))) \
if (!(skip_css) || \
cgroup_taskset_cur_css((tset), \
(skip_css)->ss->subsys_id) != (skip_css))
(skip_css)->ss->id) != (skip_css))
/*
* Control Group subsystem type.
@ -592,7 +592,7 @@ struct cgroup_subsys {
bool warned_broken_hierarchy;
/* the following two fields are initialized automtically during boot */
int subsys_id;
int id;
#define MAX_CGROUP_TYPE_NAMELEN 32
const char *name;

20
kernel/cgroup.c
View file

@ -198,7 +198,7 @@ static struct cgroup_subsys_state *cgroup_css(struct cgroup *cgrp,
struct cgroup_subsys *ss)
{
if (ss)
return rcu_dereference_check(cgrp->subsys[ss->subsys_id],
return rcu_dereference_check(cgrp->subsys[ss->id],
lockdep_is_held(&cgroup_mutex));
else
return &cgrp->dummy_css;
@ -3982,7 +3982,7 @@ static void css_release(struct percpu_ref *ref)
struct cgroup_subsys_state *css =
container_of(ref, struct cgroup_subsys_state, refcnt);
rcu_assign_pointer(css->cgroup->subsys[css->ss->subsys_id], NULL);
rcu_assign_pointer(css->cgroup->subsys[css->ss->id], NULL);
call_rcu(&css->rcu_head, css_free_rcu_fn);
}
@ -4014,7 +4014,7 @@ static int online_css(struct cgroup_subsys_state *css)
if (!ret) {
css->flags |= CSS_ONLINE;
css->cgroup->nr_css++;
rcu_assign_pointer(css->cgroup->subsys[ss->subsys_id], css);
rcu_assign_pointer(css->cgroup->subsys[ss->id], css);
}
return ret;
}
@ -4034,7 +4034,7 @@ static void offline_css(struct cgroup_subsys_state *css)
css->flags &= ~CSS_ONLINE;
css->cgroup->nr_css--;
RCU_INIT_POINTER(css->cgroup->subsys[ss->subsys_id], css);
RCU_INIT_POINTER(css->cgroup->subsys[ss->id], css);
}
/**
@ -4065,7 +4065,7 @@ static int create_css(struct cgroup *cgrp, struct cgroup_subsys *ss)
init_css(css, ss, cgrp);
err = cgroup_populate_dir(cgrp, 1 << ss->subsys_id);
err = cgroup_populate_dir(cgrp, 1 << ss->id);
if (err)
goto err_free;
@ -4292,7 +4292,7 @@ static void css_killed_ref_fn(struct percpu_ref *ref)
*/
static void kill_css(struct cgroup_subsys_state *css)
{
cgroup_clear_dir(css->cgroup, 1 << css->ss->subsys_id);
cgroup_clear_dir(css->cgroup, 1 << css->ss->id);
/*
* Killing would put the base ref, but we need to keep it alive
@ -4496,7 +4496,7 @@ static void __init cgroup_init_subsys(struct cgroup_subsys *ss)
* pointer to this state - since the subsystem is
* newly registered, all tasks and hence the
* init_css_set is in the subsystem's top cgroup. */
init_css_set.subsys[ss->subsys_id] = css;
init_css_set.subsys[ss->id] = css;
need_forkexit_callback |= ss->fork || ss->exit;
@ -4536,14 +4536,14 @@ int __init cgroup_init_early(void)
list_add(&init_cgrp_cset_link.cgrp_link, &init_css_set.cgrp_links);
for_each_subsys(ss, i) {
WARN(!ss->css_alloc || !ss->css_free || ss->name || ss->subsys_id,
WARN(!ss->css_alloc || !ss->css_free || ss->name || ss->id,
"invalid cgroup_subsys %d:%s css_alloc=%p css_free=%p name:id=%d:%s\n",
i, cgroup_subsys_name[i], ss->css_alloc, ss->css_free,
ss->subsys_id, ss->name);
ss->id, ss->name);
WARN(strlen(cgroup_subsys_name[i]) > MAX_CGROUP_TYPE_NAMELEN,
"cgroup_subsys_name %s too long\n", cgroup_subsys_name[i]);
ss->subsys_id = i;
ss->id = i;
ss->name = cgroup_subsys_name[i];
if (ss->early_init)