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| author | Tejun Heo <tj@kernel.org> | 2014-07-15 17:05:09 +0200 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-07-15 17:05:09 +0200 |
| commit | 2cf669a58dc08fa065a8bd0dca866c0e6cb358cc (patch) | |
| tree | 2a04b009299fb4262791fb46e08f5623ab471e70 /kernel/cgroup.c | |
| parent | cgroup: rename cgroup_subsys->base_cftypes to ->legacy_cftypes (diff) | |
| download | linux-2cf669a58dc08fa065a8bd0dca866c0e6cb358cc.tar.xz linux-2cf669a58dc08fa065a8bd0dca866c0e6cb358cc.zip | |
cgroup: replace cgroup_add_cftypes() with cgroup_add_legacy_cftypes()
Currently, cftypes added by cgroup_add_cftypes() are used for both the
unified default hierarchy and legacy ones and subsystems can mark each
file with either CFTYPE_ONLY_ON_DFL or CFTYPE_INSANE if it has to
appear only on one of them. This is quite hairy and error-prone.
Also, we may end up exposing interface files to the default hierarchy
without thinking it through.
cgroup_subsys will grow two separate cftype addition functions and
apply each only on the hierarchies of the matching type. This will
allow organizing cftypes in a lot clearer way and encourage subsystems
to scrutinize the interface which is being exposed in the new default
hierarchy.
In preparation, this patch adds cgroup_add_legacy_cftypes() which
currently is a simple wrapper around cgroup_add_cftypes() and replaces
all cgroup_add_cftypes() usages with it.
While at it, this patch drops a completely spurious return from
__hugetlb_cgroup_file_init().
This patch doesn't introduce any functional differences.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Li Zefan <lizefan@huawei.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/cgroup.c')
| -rw-r--r-- | kernel/cgroup.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 6496a83b0314..c275aa439a6f 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -3170,7 +3170,7 @@ int cgroup_rm_cftypes(struct cftype *cfts) * function currently returns 0 as long as @cfts registration is successful * even if some file creation attempts on existing cgroups fail. */ -int cgroup_add_cftypes(struct cgroup_subsys *ss, struct cftype *cfts) +static int cgroup_add_cftypes(struct cgroup_subsys *ss, struct cftype *cfts) { int ret; @@ -3195,6 +3195,11 @@ int cgroup_add_cftypes(struct cgroup_subsys *ss, struct cftype *cfts) return ret; } +int cgroup_add_legacy_cftypes(struct cgroup_subsys *ss, struct cftype *cfts) +{ + return cgroup_add_cftypes(ss, cfts); +} + /** * cgroup_task_count - count the number of tasks in a cgroup. * @cgrp: the cgroup in question |