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authorTejun Heo <tj@kernel.org>2017-08-11 05:49:01 -0700
committerTejun Heo <tj@kernel.org>2017-08-11 05:49:01 -0700
commit3e48930cc74f0c212ee1838f89ad0ca7fcf2fea1 (patch)
tree404751a5e18ffd2e010f0ed5fda21dc3d6d2b73a /kernel/cgroup/cgroup.c
parent13d82fb77abb9625f3ca74f5c4cbedde0f412f01 (diff)
cgroup: misc changes
Misc trivial changes to prepare for future changes. No functional difference. * Expose cgroup_get(), cgroup_tryget() and cgroup_parent(). * Implement task_dfl_cgroup() which dereferences css_set->dfl_cgrp. * Rename cgroup_stats_show() to cgroup_stat_show() for consistency with the file name. Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/cgroup/cgroup.c')
-rw-r--r--kernel/cgroup/cgroup.c23
1 files changed, 2 insertions, 21 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index f5ca55db1fe1..c038ccf95b5d 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -319,15 +319,6 @@ static void cgroup_idr_remove(struct idr *idr, int id)
spin_unlock_bh(&cgroup_idr_lock);
}
-static struct cgroup *cgroup_parent(struct cgroup *cgrp)
-{
- struct cgroup_subsys_state *parent_css = cgrp->self.parent;
-
- if (parent_css)
- return container_of(parent_css, struct cgroup, self);
- return NULL;
-}
-
static bool cgroup_has_tasks(struct cgroup *cgrp)
{
return cgrp->nr_populated_csets;
@@ -534,22 +525,12 @@ out_unlock:
return css;
}
-static void __maybe_unused cgroup_get(struct cgroup *cgrp)
-{
- css_get(&cgrp->self);
-}
-
static void cgroup_get_live(struct cgroup *cgrp)
{
WARN_ON_ONCE(cgroup_is_dead(cgrp));
css_get(&cgrp->self);
}
-static bool cgroup_tryget(struct cgroup *cgrp)
-{
- return css_tryget(&cgrp->self);
-}
-
struct cgroup_subsys_state *of_css(struct kernfs_open_file *of)
{
struct cgroup *cgrp = of->kn->parent->priv;
@@ -3306,7 +3287,7 @@ static int cgroup_events_show(struct seq_file *seq, void *v)
return 0;
}
-static int cgroup_stats_show(struct seq_file *seq, void *v)
+static int cgroup_stat_show(struct seq_file *seq, void *v)
{
struct cgroup *cgroup = seq_css(seq)->cgroup;
@@ -4423,7 +4404,7 @@ static struct cftype cgroup_base_files[] = {
},
{
.name = "cgroup.stat",
- .seq_show = cgroup_stats_show,
+ .seq_show = cgroup_stat_show,
},
{ } /* terminate */
};