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Commit bc668c75 authored by Tejun Heo's avatar Tejun Heo
Browse files

cgroup: remove cgroup_taskset_cur_css() and cgroup_taskset_size() 



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

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Acked-by: default avatarLi Zefan <lizefan@huawei.com>
parent 57fce0a6

include/linux/cgroup.h

+0 −3
Original line number Diff line number Diff line
@@ -528,9 +528,6 @@ bool cgroup_is_descendant(struct cgroup *cgrp, struct cgroup *ancestor); 
struct cgroup_taskset;

struct task_struct *cgroup_taskset_first(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

kernel/cgroup.c

+0 −30
Original line number Diff line number Diff line
@@ -1647,7 +1647,6 @@ struct cgroup_taskset { 
	struct flex_array	*tc_array;

	int			tc_array_len;

	int			idx;

	struct cgroup		*cur_cgrp;

};



/**
@@ -1662,7 +1661,6 @@ struct task_struct *cgroup_taskset_first(struct cgroup_taskset *tset) 
		tset->idx = 0;

		return cgroup_taskset_next(tset);

	} else {

		tset->cur_cgrp = tset->single.cgrp;

		return tset->single.task;

	}

}
@@ -1683,38 +1681,10 @@ struct task_struct *cgroup_taskset_next(struct cgroup_taskset *tset) 
		return NULL;



	tc = flex_array_get(tset->tc_array, tset->idx++);

	tset->cur_cgrp = tc->cgrp;

	return tc->task;

}

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.

 * @old_cgrp; the cgroup @tsk is being migrated from