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author | Tejun Heo <tj@kernel.org> | 2014-02-12 15:29:48 +0100 |
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committer | Tejun Heo <tj@kernel.org> | 2014-02-12 15:29:48 +0100 |
commit | 80b13586997d8e584caa772bd99e2a3e55ac6abe (patch) | |
tree | ced02346669ef3d032ffe6a4a8f4d064fd46840c /kernel/cgroup.c | |
parent | cgroup: warn if "xattr" is specified with "sane_behavior" (diff) | |
download | linux-80b13586997d8e584caa772bd99e2a3e55ac6abe.tar.xz linux-80b13586997d8e584caa772bd99e2a3e55ac6abe.zip |
cgroup: relocate cgroup_rm_cftypes()
cftype handling is about to be revamped. Relocate cgroup_rm_cftypes()
above cgroup_add_cftypes() in preparation. This is pure relocation.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Diffstat (limited to 'kernel/cgroup.c')
-rw-r--r-- | kernel/cgroup.c | 70 |
1 files changed, 35 insertions, 35 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index a0fab71f200f..a2cbd1549995 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -2418,6 +2418,41 @@ static int cgroup_init_cftypes(struct cgroup_subsys *ss, struct cftype *cfts) } /** + * cgroup_rm_cftypes - remove an array of cftypes from a subsystem + * @cfts: zero-length name terminated array of cftypes + * + * Unregister @cfts. Files described by @cfts are removed from all + * existing cgroups and all future cgroups won't have them either. This + * function can be called anytime whether @cfts' subsys is attached or not. + * + * Returns 0 on successful unregistration, -ENOENT if @cfts is not + * registered. + */ +int cgroup_rm_cftypes(struct cftype *cfts) +{ + struct cftype *found = NULL; + struct cftype_set *set; + + if (!cfts || !cfts[0].ss) + return -ENOENT; + + cgroup_cfts_prepare(); + + list_for_each_entry(set, &cfts[0].ss->cftsets, node) { + if (set->cfts == cfts) { + list_del(&set->node); + kfree(set); + found = cfts; + break; + } + } + + cgroup_cfts_commit(found, false); + cgroup_exit_cftypes(cfts); + return found ? 0 : -ENOENT; +} + +/** * cgroup_add_cftypes - add an array of cftypes to a subsystem * @ss: target cgroup subsystem * @cfts: zero-length name terminated array of cftypes @@ -2455,41 +2490,6 @@ int cgroup_add_cftypes(struct cgroup_subsys *ss, struct cftype *cfts) EXPORT_SYMBOL_GPL(cgroup_add_cftypes); /** - * cgroup_rm_cftypes - remove an array of cftypes from a subsystem - * @cfts: zero-length name terminated array of cftypes - * - * Unregister @cfts. Files described by @cfts are removed from all - * existing cgroups and all future cgroups won't have them either. This - * function can be called anytime whether @cfts' subsys is attached or not. - * - * Returns 0 on successful unregistration, -ENOENT if @cfts is not - * registered. - */ -int cgroup_rm_cftypes(struct cftype *cfts) -{ - struct cftype *found = NULL; - struct cftype_set *set; - - if (!cfts || !cfts[0].ss) - return -ENOENT; - - cgroup_cfts_prepare(); - - list_for_each_entry(set, &cfts[0].ss->cftsets, node) { - if (set->cfts == cfts) { - list_del(&set->node); - kfree(set); - found = cfts; - break; - } - } - - cgroup_cfts_commit(found, false); - cgroup_exit_cftypes(cfts); - return found ? 0 : -ENOENT; -} - -/** * cgroup_task_count - count the number of tasks in a cgroup. * @cgrp: the cgroup in question * |