Commit d1d4ff5d authored by Miaohe Lin's avatar Miaohe Lin Committed by Tejun Heo
Browse files

cgroup: put cgroup_tryget_css() inside CONFIG_CGROUP_SCHED 



Put cgroup_tryget_css() inside CONFIG_CGROUP_SCHED to fix the warning
of 'cgroup_tryget_css' defined but not used [-Wunused-function] when
CONFIG_CGROUP_SCHED is disabled.

Signed-off-by: default avatarMiaohe Lin <linmiaohe@huawei.com>
Reviewed-by: default avatarKamalesh Babulal <kamalesh.babulal@oracle.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 3ae0b773

kernel/cgroup/cgroup.c

+22 −22
Original line number Diff line number Diff line
@@ -492,28 +492,6 @@ static struct cgroup_subsys_state *cgroup_css(struct cgroup *cgrp, 
		return &cgrp->self;

}



/**

 * cgroup_tryget_css - try to get a cgroup's css for the specified subsystem

 * @cgrp: the cgroup of interest

 * @ss: the subsystem of interest

 *

 * Find and get @cgrp's css associated with @ss.  If the css doesn't exist

 * or is offline, %NULL is returned.

 */

static struct cgroup_subsys_state *cgroup_tryget_css(struct cgroup *cgrp,

						     struct cgroup_subsys *ss)

{

	struct cgroup_subsys_state *css;



	rcu_read_lock();

	css = cgroup_css(cgrp, ss);

	if (css && !css_tryget_online(css))

		css = NULL;

	rcu_read_unlock();



	return css;

}



/**

 * cgroup_e_css_by_mask - obtain a cgroup's effective css for the specified ss

 * @cgrp: the cgroup of interest
@@ -3655,6 +3633,28 @@ static int cgroup_stat_show(struct seq_file *seq, void *v) 
}



#ifdef CONFIG_CGROUP_SCHED

/**

 * cgroup_tryget_css - try to get a cgroup's css for the specified subsystem

 * @cgrp: the cgroup of interest

 * @ss: the subsystem of interest

 *

 * Find and get @cgrp's css associated with @ss.  If the css doesn't exist

 * or is offline, %NULL is returned.

 */

static struct cgroup_subsys_state *cgroup_tryget_css(struct cgroup *cgrp,

						     struct cgroup_subsys *ss)

{

	struct cgroup_subsys_state *css;



	rcu_read_lock();

	css = cgroup_css(cgrp, ss);

	if (css && !css_tryget_online(css))

		css = NULL;

	rcu_read_unlock();



	return css;

}



static int cgroup_extra_stat_show(struct seq_file *seq, int ssid)

{

	struct cgroup *cgrp = seq_css(seq)->cgroup;