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cgroup: remove cgroup_taskset_cur_css() and cgroup_taskset_size()

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The two functions don't have any users left.  Remove them along with
cgroup_taskset->cur_cgrp.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
This commit is contained in:
Tejun Heo 2014-02-13 06:58:43 -05:00
parent 57fce0a68e
commit bc668c7519
2 changed files with 0 additions and 33 deletions
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3
include/linux/cgroup.h
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@ -528,9 +528,6 @@ bool cgroup_is_descendant(struct cgroup *cgrp, struct cgroup *ancestor);
struct cgroup_taskset; struct cgroup_taskset;
struct task_struct *cgroup_taskset_first(struct cgroup_taskset *tset); struct task_struct *cgroup_taskset_first(struct cgroup_taskset *tset);
struct task_struct *cgroup_taskset_next(struct cgroup_taskset *tset); struct task_struct *cgroup_taskset_next(struct cgroup_taskset *tset);
struct cgroup_subsys_state *cgroup_taskset_cur_css(struct cgroup_taskset *tset,
int subsys_id);
int cgroup_taskset_size(struct cgroup_taskset *tset);
/** /**
* cgroup_taskset_for_each - iterate cgroup_taskset * cgroup_taskset_for_each - iterate cgroup_taskset

30
kernel/cgroup.c
View File

@ -1647,7 +1647,6 @@ struct cgroup_taskset {
struct flex_array *tc_array; struct flex_array *tc_array;
int tc_array_len; int tc_array_len;
int idx; int idx;
struct cgroup *cur_cgrp;
}; };
/** /**
@ -1662,7 +1661,6 @@ struct task_struct *cgroup_taskset_first(struct cgroup_taskset *tset)
tset->idx = 0; tset->idx = 0;
return cgroup_taskset_next(tset); return cgroup_taskset_next(tset);
} else { } else {
tset->cur_cgrp = tset->single.cgrp;
return tset->single.task; return tset->single.task;
} }
} }
@ -1683,38 +1681,10 @@ struct task_struct *cgroup_taskset_next(struct cgroup_taskset *tset)
return NULL; return NULL;
tc = flex_array_get(tset->tc_array, tset->idx++); tc = flex_array_get(tset->tc_array, tset->idx++);
tset->cur_cgrp = tc->cgrp;
return tc->task; return tc->task;
} }
EXPORT_SYMBOL_GPL(cgroup_taskset_next); EXPORT_SYMBOL_GPL(cgroup_taskset_next);
/**
* cgroup_taskset_cur_css - return the matching css for the current task
* @tset: taskset of interest
* @subsys_id: the ID of the target subsystem
*
* Return the css for the current (last returned) task of @tset for
* subsystem specified by @subsys_id. This function must be preceded by
* either cgroup_taskset_first() or cgroup_taskset_next().
*/
struct cgroup_subsys_state *cgroup_taskset_cur_css(struct cgroup_taskset *tset,
int subsys_id)
{
return cgroup_css(tset->cur_cgrp, cgroup_subsys[subsys_id]);
}
EXPORT_SYMBOL_GPL(cgroup_taskset_cur_css);
/**
* cgroup_taskset_size - return the number of tasks in taskset
* @tset: taskset of interest
*/
int cgroup_taskset_size(struct cgroup_taskset *tset)
{
return tset->tc_array ? tset->tc_array_len : 1;
}
EXPORT_SYMBOL_GPL(cgroup_taskset_size);
/** /**
* cgroup_task_migrate - move a task from one cgroup to another. * cgroup_task_migrate - move a task from one cgroup to another.
* @old_cgrp; the cgroup @tsk is being migrated from * @old_cgrp; the cgroup @tsk is being migrated from