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Commit 2866c0b4 authored by Tejun Heo's avatar Tejun Heo
Browse files

cgroup: refactor cgroup_masks_read() in the debug controller 



Factor out cgroup_masks_read_one() out of cgroup_masks_read() for
simplicity.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Cc: Waiman Long <longman@redhat.com>
parent 8cc38fa7

kernel/cgroup/debug.c

+21 −25
Original line number Diff line number Diff line
@@ -200,27 +200,16 @@ static int cgroup_subsys_states_read(struct seq_file *seq, void *v) 
	return 0;

}



static int cgroup_masks_read(struct seq_file *seq, void *v)

static void cgroup_masks_read_one(struct seq_file *seq, const char *name,

				  u16 mask)

{

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

	struct cgroup_subsys *ss;

	int i, j;

	struct {

		u16  *mask;

		char *name;

	} mask_list[] = {

		{ &cgrp->subtree_control,  "subtree_control"  },

		{ &cgrp->subtree_ss_mask,  "subtree_ss_mask"  },

	};



	mutex_lock(&cgroup_mutex);

	for (i = 0; i < ARRAY_SIZE(mask_list); i++) {

		u16 mask = *mask_list[i].mask;

	int ssid;

	bool first = true;



		seq_printf(seq, "%-17s: ", mask_list[i].name);

		for_each_subsys(ss, j) {

			if (!(mask & (1 << ss->id)))

	seq_printf(seq, "%-17s: ", name);

	for_each_subsys(ss, ssid) {

		if (!(mask & (1 << ssid)))

			continue;

		if (!first)

			seq_puts(seq, ", ");
@@ -230,6 +219,13 @@ static int cgroup_masks_read(struct seq_file *seq, void *v) 
	seq_putc(seq, '\n');

}



static int cgroup_masks_read(struct seq_file *seq, void *v)

{

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



	mutex_lock(&cgroup_mutex);

	cgroup_masks_read_one(seq, "subtree_control", cgrp->subtree_control);

	cgroup_masks_read_one(seq, "subtree_ss_mask", cgrp->subtree_ss_mask);

	mutex_unlock(&cgroup_mutex);

	return 0;

}