Commit d16b3af4 authored by Miaohe Lin's avatar Miaohe Lin Committed by Tejun Heo
Browse files

cgroup: remove unused task_cgroup_path() 



task_cgroup_path() is not used anymore. So remove it.

Signed-off-by: default avatarMiaohe Lin <linmiaohe@huawei.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 5273ee25

include/linux/cgroup.h

+0 −1
Original line number Diff line number Diff line
@@ -118,7 +118,6 @@ int cgroup_rm_cftypes(struct cftype *cfts); 
void cgroup_file_notify(struct cgroup_file *cfile);

void cgroup_file_show(struct cgroup_file *cfile, bool show);



int task_cgroup_path(struct task_struct *task, char *buf, size_t buflen);

int cgroupstats_build(struct cgroupstats *stats, struct dentry *dentry);

int proc_cgroup_show(struct seq_file *m, struct pid_namespace *ns,

		     struct pid *pid, struct task_struct *tsk);

kernel/cgroup/cgroup.c

+0 −39
Original line number Diff line number Diff line
@@ -2364,45 +2364,6 @@ int cgroup_path_ns(struct cgroup *cgrp, char *buf, size_t buflen, 
}

EXPORT_SYMBOL_GPL(cgroup_path_ns);



/**

 * task_cgroup_path - cgroup path of a task in the first cgroup hierarchy

 * @task: target task

 * @buf: the buffer to write the path into

 * @buflen: the length of the buffer

 *

 * Determine @task's cgroup on the first (the one with the lowest non-zero

 * hierarchy_id) cgroup hierarchy and copy its path into @buf.  This

 * function grabs cgroup_mutex and shouldn't be used inside locks used by

 * cgroup controller callbacks.

 *

 * Return value is the same as kernfs_path().

 */

int task_cgroup_path(struct task_struct *task, char *buf, size_t buflen)

{

	struct cgroup_root *root;

	struct cgroup *cgrp;

	int hierarchy_id = 1;

	int ret;



	cgroup_lock();

	spin_lock_irq(&css_set_lock);



	root = idr_get_next(&cgroup_hierarchy_idr, &hierarchy_id);



	if (root) {

		cgrp = task_cgroup_from_root(task, root);

		ret = cgroup_path_ns_locked(cgrp, buf, buflen, &init_cgroup_ns);

	} else {

		/* if no hierarchy exists, everyone is in "/" */

		ret = strscpy(buf, "/", buflen);

	}



	spin_unlock_irq(&css_set_lock);

	cgroup_unlock();

	return ret;

}

EXPORT_SYMBOL_GPL(task_cgroup_path);



/**

 * cgroup_attach_lock - Lock for ->attach()

 * @lock_threadgroup: whether to down_write cgroup_threadgroup_rwsem