[net-next-2.6.git] / kernel / rcutree_trace.c

/*
 * Read-Copy Update tracing for classic implementation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * Copyright IBM Corporation, 2008
 *
 * Papers:  http://www.rdrop.com/users/paulmck/RCU
 *
 * For detailed explanation of Read-Copy Update mechanism see -
 * 		Documentation/RCU
 *
 */
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/smp.h>
#include <linux/rcupdate.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <asm/atomic.h>
#include <linux/bitops.h>
#include <linux/module.h>
#include <linux/completion.h>
#include <linux/moduleparam.h>
#include <linux/percpu.h>
#include <linux/notifier.h>
#include <linux/cpu.h>
#include <linux/mutex.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>

#define RCU_TREE_NONCORE
#include "rcutree.h"

static void print_one_rcu_data(struct seq_file *m, struct rcu_data *rdp)
{
	if (!rdp->beenonline)
		return;
	seq_printf(m, "%3d%cc=%ld g=%ld pq=%d pqc=%ld qp=%d",
		   rdp->cpu,
		   cpu_is_offline(rdp->cpu) ? '!' : ' ',
		   rdp->completed, rdp->gpnum,
		   rdp->passed_quiesc, rdp->passed_quiesc_completed,
		   rdp->qs_pending);
#ifdef CONFIG_NO_HZ
	seq_printf(m, " dt=%d/%d dn=%d df=%lu",
		   rdp->dynticks->dynticks,
		   rdp->dynticks->dynticks_nesting,
		   rdp->dynticks->dynticks_nmi,
		   rdp->dynticks_fqs);
#endif /* #ifdef CONFIG_NO_HZ */
	seq_printf(m, " of=%lu ri=%lu", rdp->offline_fqs, rdp->resched_ipi);
	seq_printf(m, " ql=%ld b=%ld\n", rdp->qlen, rdp->blimit);
}

#define PRINT_RCU_DATA(name, func, m) \
	do { \
		int _p_r_d_i; \
		\
		for_each_possible_cpu(_p_r_d_i) \
			func(m, &per_cpu(name, _p_r_d_i)); \
	} while (0)

static int show_rcudata(struct seq_file *m, void *unused)
{
	seq_puts(m, "rcu_sched:\n");
	PRINT_RCU_DATA(rcu_sched_data, print_one_rcu_data, m);
	seq_puts(m, "rcu_bh:\n");
	PRINT_RCU_DATA(rcu_bh_data, print_one_rcu_data, m);
	return 0;
}

static int rcudata_open(struct inode *inode, struct file *file)
{
	return single_open(file, show_rcudata, NULL);
}

static struct file_operations rcudata_fops = {
	.owner = THIS_MODULE,
	.open = rcudata_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static void print_one_rcu_data_csv(struct seq_file *m, struct rcu_data *rdp)
{
	if (!rdp->beenonline)
		return;
	seq_printf(m, "%d,%s,%ld,%ld,%d,%ld,%d",
		   rdp->cpu,
		   cpu_is_offline(rdp->cpu) ? "\"Y\"" : "\"N\"",
		   rdp->completed, rdp->gpnum,
		   rdp->passed_quiesc, rdp->passed_quiesc_completed,
		   rdp->qs_pending);
#ifdef CONFIG_NO_HZ
	seq_printf(m, ",%d,%d,%d,%lu",
		   rdp->dynticks->dynticks,
		   rdp->dynticks->dynticks_nesting,
		   rdp->dynticks->dynticks_nmi,
		   rdp->dynticks_fqs);
#endif /* #ifdef CONFIG_NO_HZ */
	seq_printf(m, ",%lu,%lu", rdp->offline_fqs, rdp->resched_ipi);
	seq_printf(m, ",%ld,%ld\n", rdp->qlen, rdp->blimit);
}

static int show_rcudata_csv(struct seq_file *m, void *unused)
{
	seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pqc\",\"pq\",");
#ifdef CONFIG_NO_HZ
	seq_puts(m, "\"dt\",\"dt nesting\",\"dn\",\"df\",");
#endif /* #ifdef CONFIG_NO_HZ */
	seq_puts(m, "\"of\",\"ri\",\"ql\",\"b\"\n");
	seq_puts(m, "\"rcu_sched:\"\n");
	PRINT_RCU_DATA(rcu_sched_data, print_one_rcu_data_csv, m);
	seq_puts(m, "\"rcu_bh:\"\n");
	PRINT_RCU_DATA(rcu_bh_data, print_one_rcu_data_csv, m);
	return 0;
}

static int rcudata_csv_open(struct inode *inode, struct file *file)
{
	return single_open(file, show_rcudata_csv, NULL);
}

static struct file_operations rcudata_csv_fops = {
	.owner = THIS_MODULE,
	.open = rcudata_csv_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp)
{
	int level = 0;
	struct rcu_node *rnp;

	seq_printf(m, "c=%ld g=%ld s=%d jfq=%ld j=%x "
	              "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu\n",
		   rsp->completed, rsp->gpnum, rsp->signaled,
		   (long)(rsp->jiffies_force_qs - jiffies),
		   (int)(jiffies & 0xffff),
		   rsp->n_force_qs, rsp->n_force_qs_ngp,
		   rsp->n_force_qs - rsp->n_force_qs_ngp,
		   rsp->n_force_qs_lh);
	for (rnp = &rsp->node[0]; rnp - &rsp->node[0] < NUM_RCU_NODES; rnp++) {
		if (rnp->level != level) {
			seq_puts(m, "\n");
			level = rnp->level;
		}
		seq_printf(m, "%lx/%lx %d:%d ^%d    ",
			   rnp->qsmask, rnp->qsmaskinit,
			   rnp->grplo, rnp->grphi, rnp->grpnum);
	}
	seq_puts(m, "\n");
}

static int show_rcuhier(struct seq_file *m, void *unused)
{
	seq_puts(m, "rcu_sched:\n");
	print_one_rcu_state(m, &rcu_sched_state);
	seq_puts(m, "rcu_bh:\n");
	print_one_rcu_state(m, &rcu_bh_state);
	return 0;
}

static int rcuhier_open(struct inode *inode, struct file *file)
{
	return single_open(file, show_rcuhier, NULL);
}

static struct file_operations rcuhier_fops = {
	.owner = THIS_MODULE,
	.open = rcuhier_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static int show_rcugp(struct seq_file *m, void *unused)
{
	seq_printf(m, "rcu_sched: completed=%ld  gpnum=%ld\n",
		   rcu_sched_state.completed, rcu_sched_state.gpnum);
	seq_printf(m, "rcu_bh: completed=%ld  gpnum=%ld\n",
		   rcu_bh_state.completed, rcu_bh_state.gpnum);
	return 0;
}

static int rcugp_open(struct inode *inode, struct file *file)
{
	return single_open(file, show_rcugp, NULL);
}

static struct file_operations rcugp_fops = {
	.owner = THIS_MODULE,
	.open = rcugp_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static void print_one_rcu_pending(struct seq_file *m, struct rcu_data *rdp)
{
	seq_printf(m, "%3d%cnp=%ld "
		   "qsp=%ld cbr=%ld cng=%ld gpc=%ld gps=%ld nf=%ld nn=%ld\n",
		   rdp->cpu,
		   cpu_is_offline(rdp->cpu) ? '!' : ' ',
		   rdp->n_rcu_pending,
		   rdp->n_rp_qs_pending,
		   rdp->n_rp_cb_ready,
		   rdp->n_rp_cpu_needs_gp,
		   rdp->n_rp_gp_completed,
		   rdp->n_rp_gp_started,
		   rdp->n_rp_need_fqs,
		   rdp->n_rp_need_nothing);
}

static void print_rcu_pendings(struct seq_file *m, struct rcu_state *rsp)
{
	int cpu;
	struct rcu_data *rdp;

	for_each_possible_cpu(cpu) {
		rdp = rsp->rda[cpu];
		if (rdp->beenonline)
			print_one_rcu_pending(m, rdp);
	}
}

static int show_rcu_pending(struct seq_file *m, void *unused)
{
	seq_puts(m, "rcu_sched:\n");
	print_rcu_pendings(m, &rcu_sched_state);
	seq_puts(m, "rcu_bh:\n");
	print_rcu_pendings(m, &rcu_bh_state);
	return 0;
}

static int rcu_pending_open(struct inode *inode, struct file *file)
{
	return single_open(file, show_rcu_pending, NULL);
}

static struct file_operations rcu_pending_fops = {
	.owner = THIS_MODULE,
	.open = rcu_pending_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static struct dentry *rcudir;
static struct dentry *datadir;
static struct dentry *datadir_csv;
static struct dentry *gpdir;
static struct dentry *hierdir;
static struct dentry *rcu_pendingdir;

static int __init rcuclassic_trace_init(void)
{
	rcudir = debugfs_create_dir("rcu", NULL);
	if (!rcudir)
		goto out;

	datadir = debugfs_create_file("rcudata", 0444, rcudir,
						NULL, &rcudata_fops);
	if (!datadir)
		goto free_out;

	datadir_csv = debugfs_create_file("rcudata.csv", 0444, rcudir,
						NULL, &rcudata_csv_fops);
	if (!datadir_csv)
		goto free_out;

	gpdir = debugfs_create_file("rcugp", 0444, rcudir, NULL, &rcugp_fops);
	if (!gpdir)
		goto free_out;

	hierdir = debugfs_create_file("rcuhier", 0444, rcudir,
						NULL, &rcuhier_fops);
	if (!hierdir)
		goto free_out;

	rcu_pendingdir = debugfs_create_file("rcu_pending", 0444, rcudir,
						NULL, &rcu_pending_fops);
	if (!rcu_pendingdir)
		goto free_out;
	return 0;
free_out:
	if (datadir)
		debugfs_remove(datadir);
	if (datadir_csv)
		debugfs_remove(datadir_csv);
	if (gpdir)
		debugfs_remove(gpdir);
	debugfs_remove(rcudir);
out:
	return 1;
}

static void __exit rcuclassic_trace_cleanup(void)
{
	debugfs_remove(datadir);
	debugfs_remove(datadir_csv);
	debugfs_remove(gpdir);
	debugfs_remove(hierdir);
	debugfs_remove(rcu_pendingdir);
	debugfs_remove(rcudir);
}


module_init(rcuclassic_trace_init);
module_exit(rcuclassic_trace_cleanup);

MODULE_AUTHOR("Paul E. McKenney");
MODULE_DESCRIPTION("Read-Copy Update tracing for hierarchical implementation");
MODULE_LICENSE("GPL");
Commit	Line	Data
64db4cff PM	1	/*
	2	* Read-Copy Update tracing for classic implementation
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation; either version 2 of the License, or
	7	* (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	17	*
	18	* Copyright IBM Corporation, 2008
	19	*
	20	* Papers: http://www.rdrop.com/users/paulmck/RCU
	21	*
	22	* For detailed explanation of Read-Copy Update mechanism see -
	23	* Documentation/RCU
	24	*
	25	*/
	26	#include <linux/types.h>
	27	#include <linux/kernel.h>
	28	#include <linux/init.h>
	29	#include <linux/spinlock.h>
	30	#include <linux/smp.h>
	31	#include <linux/rcupdate.h>
	32	#include <linux/interrupt.h>
	33	#include <linux/sched.h>
	34	#include <asm/atomic.h>
	35	#include <linux/bitops.h>
	36	#include <linux/module.h>
	37	#include <linux/completion.h>
	38	#include <linux/moduleparam.h>
	39	#include <linux/percpu.h>
	40	#include <linux/notifier.h>
	41	#include <linux/cpu.h>
	42	#include <linux/mutex.h>
	43	#include <linux/debugfs.h>
	44	#include <linux/seq_file.h>
	45
9f77da9f	46	#define RCU_TREE_NONCORE
6258c4fb IM	47	#include "rcutree.h"
6258c4fb IM	48
64db4cff PM	49	static void print_one_rcu_data(struct seq_file m, struct rcu_data rdp)
	50	{
	51	if (!rdp->beenonline)
	52	return;
ef631b0c	53	seq_printf(m, "%3d%cc=%ld g=%ld pq=%d pqc=%ld qp=%d",
64db4cff PM	54	rdp->cpu,
	55	cpu_is_offline(rdp->cpu) ? '!' : ' ',
	56	rdp->completed, rdp->gpnum,
	57	rdp->passed_quiesc, rdp->passed_quiesc_completed,
ef631b0c	58	rdp->qs_pending);
64db4cff PM	59	#ifdef CONFIG_NO_HZ
	60	seq_printf(m, " dt=%d/%d dn=%d df=%lu",
	61	rdp->dynticks->dynticks,
	62	rdp->dynticks->dynticks_nesting,
	63	rdp->dynticks->dynticks_nmi,
	64	rdp->dynticks_fqs);
	65	#endif /* #ifdef CONFIG_NO_HZ */
	66	seq_printf(m, " of=%lu ri=%lu", rdp->offline_fqs, rdp->resched_ipi);
	67	seq_printf(m, " ql=%ld b=%ld\n", rdp->qlen, rdp->blimit);
	68	}
	69
	70	#define PRINT_RCU_DATA(name, func, m) \
	71	do { \
	72	int _p_r_d_i; \
	73	\
	74	for_each_possible_cpu(_p_r_d_i) \
	75	func(m, &per_cpu(name, _p_r_d_i)); \
	76	} while (0)
	77
	78	static int show_rcudata(struct seq_file m, void unused)
	79	{
d6714c22 PM	80	seq_puts(m, "rcu_sched:\n");
d6714c22 PM	81	PRINT_RCU_DATA(rcu_sched_data, print_one_rcu_data, m);
64db4cff PM	82	seq_puts(m, "rcu_bh:\n");
	83	PRINT_RCU_DATA(rcu_bh_data, print_one_rcu_data, m);
	84	return 0;
	85	}
	86
	87	static int rcudata_open(struct inode inode, struct file file)
	88	{
	89	return single_open(file, show_rcudata, NULL);
	90	}
	91
	92	static struct file_operations rcudata_fops = {
	93	.owner = THIS_MODULE,
	94	.open = rcudata_open,
	95	.read = seq_read,
	96	.llseek = seq_lseek,
	97	.release = single_release,
	98	};
	99
	100	static void print_one_rcu_data_csv(struct seq_file m, struct rcu_data rdp)
	101	{
	102	if (!rdp->beenonline)
	103	return;
ef631b0c	104	seq_printf(m, "%d,%s,%ld,%ld,%d,%ld,%d",
64db4cff PM	105	rdp->cpu,
	106	cpu_is_offline(rdp->cpu) ? "\"Y\"" : "\"N\"",
	107	rdp->completed, rdp->gpnum,
	108	rdp->passed_quiesc, rdp->passed_quiesc_completed,
ef631b0c	109	rdp->qs_pending);
64db4cff PM	110	#ifdef CONFIG_NO_HZ
	111	seq_printf(m, ",%d,%d,%d,%lu",
	112	rdp->dynticks->dynticks,
	113	rdp->dynticks->dynticks_nesting,
	114	rdp->dynticks->dynticks_nmi,
	115	rdp->dynticks_fqs);
	116	#endif /* #ifdef CONFIG_NO_HZ */
	117	seq_printf(m, ",%lu,%lu", rdp->offline_fqs, rdp->resched_ipi);
	118	seq_printf(m, ",%ld,%ld\n", rdp->qlen, rdp->blimit);
	119	}
	120
	121	static int show_rcudata_csv(struct seq_file m, void unused)
	122	{
ef631b0c	123	seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pqc\",\"pq\",");
64db4cff PM	124	#ifdef CONFIG_NO_HZ
	125	seq_puts(m, "\"dt\",\"dt nesting\",\"dn\",\"df\",");
	126	#endif /* #ifdef CONFIG_NO_HZ */
	127	seq_puts(m, "\"of\",\"ri\",\"ql\",\"b\"\n");
d6714c22 PM	128	seq_puts(m, "\"rcu_sched:\"\n");
d6714c22 PM	129	PRINT_RCU_DATA(rcu_sched_data, print_one_rcu_data_csv, m);
64db4cff PM	130	seq_puts(m, "\"rcu_bh:\"\n");
	131	PRINT_RCU_DATA(rcu_bh_data, print_one_rcu_data_csv, m);
	132	return 0;
	133	}
	134
	135	static int rcudata_csv_open(struct inode inode, struct file file)
	136	{
	137	return single_open(file, show_rcudata_csv, NULL);
	138	}
	139
	140	static struct file_operations rcudata_csv_fops = {
	141	.owner = THIS_MODULE,
	142	.open = rcudata_csv_open,
	143	.read = seq_read,
	144	.llseek = seq_lseek,
	145	.release = single_release,
	146	};
	147
	148	static void print_one_rcu_state(struct seq_file m, struct rcu_state rsp)
	149	{
	150	int level = 0;
	151	struct rcu_node *rnp;
	152
	153	seq_printf(m, "c=%ld g=%ld s=%d jfq=%ld j=%x "
	154	"nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu\n",
	155	rsp->completed, rsp->gpnum, rsp->signaled,
	156	(long)(rsp->jiffies_force_qs - jiffies),
	157	(int)(jiffies & 0xffff),
	158	rsp->n_force_qs, rsp->n_force_qs_ngp,
	159	rsp->n_force_qs - rsp->n_force_qs_ngp,
	160	rsp->n_force_qs_lh);
	161	for (rnp = &rsp->node[0]; rnp - &rsp->node[0] < NUM_RCU_NODES; rnp++) {
	162	if (rnp->level != level) {
	163	seq_puts(m, "\n");
	164	level = rnp->level;
	165	}
	166	seq_printf(m, "%lx/%lx %d:%d ^%d ",
	167	rnp->qsmask, rnp->qsmaskinit,
	168	rnp->grplo, rnp->grphi, rnp->grpnum);
	169	}
	170	seq_puts(m, "\n");
	171	}
	172
	173	static int show_rcuhier(struct seq_file m, void unused)
	174	{
d6714c22 PM	175	seq_puts(m, "rcu_sched:\n");
d6714c22 PM	176	print_one_rcu_state(m, &rcu_sched_state);
64db4cff PM	177	seq_puts(m, "rcu_bh:\n");
	178	print_one_rcu_state(m, &rcu_bh_state);
	179	return 0;
	180	}
	181
	182	static int rcuhier_open(struct inode inode, struct file file)
	183	{
	184	return single_open(file, show_rcuhier, NULL);
	185	}
	186
	187	static struct file_operations rcuhier_fops = {
	188	.owner = THIS_MODULE,
	189	.open = rcuhier_open,
	190	.read = seq_read,
	191	.llseek = seq_lseek,
	192	.release = single_release,
	193	};
	194
	195	static int show_rcugp(struct seq_file m, void unused)
	196	{
d6714c22 PM	197	seq_printf(m, "rcu_sched: completed=%ld gpnum=%ld\n",
d6714c22 PM	198	rcu_sched_state.completed, rcu_sched_state.gpnum);
64db4cff PM	199	seq_printf(m, "rcu_bh: completed=%ld gpnum=%ld\n",
	200	rcu_bh_state.completed, rcu_bh_state.gpnum);
	201	return 0;
	202	}
	203
	204	static int rcugp_open(struct inode inode, struct file file)
	205	{
	206	return single_open(file, show_rcugp, NULL);
	207	}
	208
	209	static struct file_operations rcugp_fops = {
	210	.owner = THIS_MODULE,
	211	.open = rcugp_open,
	212	.read = seq_read,
	213	.llseek = seq_lseek,
	214	.release = single_release,
	215	};
	216
7ba5c840 PM	217	static void print_one_rcu_pending(struct seq_file m, struct rcu_data rdp)
	218	{
	219	seq_printf(m, "%3d%cnp=%ld "
	220	"qsp=%ld cbr=%ld cng=%ld gpc=%ld gps=%ld nf=%ld nn=%ld\n",
	221	rdp->cpu,
	222	cpu_is_offline(rdp->cpu) ? '!' : ' ',
	223	rdp->n_rcu_pending,
	224	rdp->n_rp_qs_pending,
	225	rdp->n_rp_cb_ready,
	226	rdp->n_rp_cpu_needs_gp,
	227	rdp->n_rp_gp_completed,
	228	rdp->n_rp_gp_started,
	229	rdp->n_rp_need_fqs,
	230	rdp->n_rp_need_nothing);
	231	}
	232
	233	static void print_rcu_pendings(struct seq_file m, struct rcu_state rsp)
	234	{
	235	int cpu;
	236	struct rcu_data *rdp;
	237
	238	for_each_possible_cpu(cpu) {
	239	rdp = rsp->rda[cpu];
	240	if (rdp->beenonline)
	241	print_one_rcu_pending(m, rdp);
	242	}
	243	}
	244
	245	static int show_rcu_pending(struct seq_file m, void unused)
	246	{
d6714c22 PM	247	seq_puts(m, "rcu_sched:\n");
d6714c22 PM	248	print_rcu_pendings(m, &rcu_sched_state);
7ba5c840 PM	249	seq_puts(m, "rcu_bh:\n");
	250	print_rcu_pendings(m, &rcu_bh_state);
	251	return 0;
	252	}
	253
	254	static int rcu_pending_open(struct inode inode, struct file file)
	255	{
	256	return single_open(file, show_rcu_pending, NULL);
	257	}
	258
	259	static struct file_operations rcu_pending_fops = {
	260	.owner = THIS_MODULE,
	261	.open = rcu_pending_open,
	262	.read = seq_read,
	263	.llseek = seq_lseek,
	264	.release = single_release,
	265	};
	266
	267	static struct dentry *rcudir;
	268	static struct dentry *datadir;
	269	static struct dentry *datadir_csv;
	270	static struct dentry *gpdir;
	271	static struct dentry *hierdir;
	272	static struct dentry *rcu_pendingdir;
	273
64db4cff PM	274	static int __init rcuclassic_trace_init(void)
	275	{
	276	rcudir = debugfs_create_dir("rcu", NULL);
	277	if (!rcudir)
	278	goto out;
	279
	280	datadir = debugfs_create_file("rcudata", 0444, rcudir,
	281	NULL, &rcudata_fops);
	282	if (!datadir)
	283	goto free_out;
	284
	285	datadir_csv = debugfs_create_file("rcudata.csv", 0444, rcudir,
	286	NULL, &rcudata_csv_fops);
	287	if (!datadir_csv)
	288	goto free_out;
	289
	290	gpdir = debugfs_create_file("rcugp", 0444, rcudir, NULL, &rcugp_fops);
	291	if (!gpdir)
	292	goto free_out;
	293
	294	hierdir = debugfs_create_file("rcuhier", 0444, rcudir,
	295	NULL, &rcuhier_fops);
	296	if (!hierdir)
	297	goto free_out;
7ba5c840 PM	298
	299	rcu_pendingdir = debugfs_create_file("rcu_pending", 0444, rcudir,
	300	NULL, &rcu_pending_fops);
	301	if (!rcu_pendingdir)
	302	goto free_out;
64db4cff PM	303	return 0;
	304	free_out:
	305	if (datadir)
	306	debugfs_remove(datadir);
	307	if (datadir_csv)
	308	debugfs_remove(datadir_csv);
	309	if (gpdir)
	310	debugfs_remove(gpdir);
	311	debugfs_remove(rcudir);
	312	out:
	313	return 1;
	314	}
	315
	316	static void __exit rcuclassic_trace_cleanup(void)
	317	{
	318	debugfs_remove(datadir);
	319	debugfs_remove(datadir_csv);
	320	debugfs_remove(gpdir);
	321	debugfs_remove(hierdir);
7ba5c840	322	debugfs_remove(rcu_pendingdir);
64db4cff PM	323	debugfs_remove(rcudir);
	324	}
	325
	326
	327	module_init(rcuclassic_trace_init);
	328	module_exit(rcuclassic_trace_cleanup);
	329
	330	MODULE_AUTHOR("Paul E. McKenney");
	331	MODULE_DESCRIPTION("Read-Copy Update tracing for hierarchical implementation");
	332	MODULE_LICENSE("GPL");