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cgroup: replace cgroup_subsys->disabled tests with cgroup_subsys_enabled()

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Replace cgroup_subsys->disabled tests in controllers with
cgroup_subsys_enabled().  cgroup_subsys_enabled() requires literal
subsys name as its parameter and thus can't be used for cgroup core
which iterates through controllers.  For cgroup core, introduce and
use cgroup_ssid_enabled() which uses slower static_key_enabled() test
and can be indexed by subsys ID.

This leaves cgroup_subsys->disabled unused.  Removed.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Zefan Li <lizefan@huawei.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
This commit is contained in:
Tejun Heo 2015-09-18 11:56:28 -04:00
parent 49d1dc4b81
commit fc5ed1e954
4 changed files with 23 additions and 14 deletions
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1
include/linux/cgroup-defs.h
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@ -419,7 +419,6 @@ struct cgroup_subsys {
struct task_struct *task);
void (*bind)(struct cgroup_subsys_state *root_css);
int disabled;
int early_init;
/*