diff options
| -rw-r--r-- | kernel/cgroup.c | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index fde3633ef389..42e588ef62d1 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -2770,6 +2770,22 @@ static int cgroup_cfts_commit(struct cftype *cfts, bool is_add) return ret; } +static void cgroup_exit_cftypes(struct cftype *cfts) +{ + struct cftype *cft; + + for (cft = cfts; cft->name[0] != '\0'; cft++) + cft->ss = NULL; +} + +static void cgroup_init_cftypes(struct cgroup_subsys *ss, struct cftype *cfts) +{ + struct cftype *cft; + + for (cft = cfts; cft->name[0] != '\0'; cft++) + cft->ss = ss; +} + /** * cgroup_add_cftypes - add an array of cftypes to a subsystem * @ss: target cgroup subsystem @@ -2787,15 +2803,13 @@ static int cgroup_cfts_commit(struct cftype *cfts, bool is_add) int cgroup_add_cftypes(struct cgroup_subsys *ss, struct cftype *cfts) { struct cftype_set *set; - struct cftype *cft; int ret; set = kzalloc(sizeof(*set), GFP_KERNEL); if (!set) return -ENOMEM; - for (cft = cfts; cft->name[0] != '\0'; cft++) - cft->ss = ss; + cgroup_init_cftypes(ss, cfts); cgroup_cfts_prepare(); set->cfts = cfts; @@ -2820,6 +2834,7 @@ EXPORT_SYMBOL_GPL(cgroup_add_cftypes); */ int cgroup_rm_cftypes(struct cftype *cfts) { + struct cftype *found = NULL; struct cftype_set *set; if (!cfts || !cfts[0].ss) @@ -2831,13 +2846,14 @@ int cgroup_rm_cftypes(struct cftype *cfts) if (set->cfts == cfts) { list_del(&set->node); kfree(set); - cgroup_cfts_commit(cfts, false); - return 0; + found = cfts; + break; } } - cgroup_cfts_commit(NULL, false); - return -ENOENT; + cgroup_cfts_commit(found, false); + cgroup_exit_cftypes(cfts); + return found ? 0 : -ENOENT; } /** @@ -4596,6 +4612,8 @@ int __init cgroup_init(void) if (err) return err; + cgroup_init_cftypes(NULL, cgroup_base_files); + for_each_subsys(ss, i) { if (!ss->early_init) cgroup_init_subsys(ss); |