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

/*
 * kernel/lockdep_proc.c
 *
 * Runtime locking correctness validator
 *
 * Started by Ingo Molnar:
 *
 *  Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
 *
 * Code for /proc/lockdep and /proc/lockdep_stats:
 *
 */
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/kallsyms.h>
#include <linux/debug_locks.h>

#include "lockdep_internals.h"

static void *l_next(struct seq_file *m, void *v, loff_t *pos)
{
	struct lock_class *class = v;

	(*pos)++;

	if (class->lock_entry.next != &all_lock_classes)
		class = list_entry(class->lock_entry.next, struct lock_class,
				  lock_entry);
	else
		class = NULL;
	m->private = class;

	return class;
}

static void *l_start(struct seq_file *m, loff_t *pos)
{
	struct lock_class *class = m->private;

	if (&class->lock_entry == all_lock_classes.next)
		seq_printf(m, "all lock classes:\n");

	return class;
}

static void l_stop(struct seq_file *m, void *v)
{
}

static unsigned long count_forward_deps(struct lock_class *class)
{
	struct lock_list *entry;
	unsigned long ret = 1;

	/*
	 * Recurse this class's dependency list:
	 */
	list_for_each_entry(entry, &class->locks_after, entry)
		ret += count_forward_deps(entry->class);

	return ret;
}

static unsigned long count_backward_deps(struct lock_class *class)
{
	struct lock_list *entry;
	unsigned long ret = 1;

	/*
	 * Recurse this class's dependency list:
	 */
	list_for_each_entry(entry, &class->locks_before, entry)
		ret += count_backward_deps(entry->class);

	return ret;
}

static void print_name(struct seq_file *m, struct lock_class *class)
{
	char str[128];
	const char *name = class->name;

	if (!name) {
		name = __get_key_name(class->key, str);
		seq_printf(m, "%s", name);
	} else{
		seq_printf(m, "%s", name);
		if (class->name_version > 1)
			seq_printf(m, "#%d", class->name_version);
		if (class->subclass)
			seq_printf(m, "/%d", class->subclass);
	}
}

static int l_show(struct seq_file *m, void *v)
{
	unsigned long nr_forward_deps, nr_backward_deps;
	struct lock_class *class = m->private;
	struct lock_list *entry;
	char c1, c2, c3, c4;

	seq_printf(m, "%p", class->key);
#ifdef CONFIG_DEBUG_LOCKDEP
	seq_printf(m, " OPS:%8ld", class->ops);
#endif
	nr_forward_deps = count_forward_deps(class);
	seq_printf(m, " FD:%5ld", nr_forward_deps);

	nr_backward_deps = count_backward_deps(class);
	seq_printf(m, " BD:%5ld", nr_backward_deps);

	get_usage_chars(class, &c1, &c2, &c3, &c4);
	seq_printf(m, " %c%c%c%c", c1, c2, c3, c4);

	seq_printf(m, ": ");
	print_name(m, class);
	seq_puts(m, "\n");

	list_for_each_entry(entry, &class->locks_after, entry) {
		if (entry->distance == 1) {
			seq_printf(m, " -> [%p] ", entry->class);
			print_name(m, entry->class);
			seq_puts(m, "\n");
		}
	}
	seq_puts(m, "\n");

	return 0;
}

static const struct seq_operations lockdep_ops = {
	.start	= l_start,
	.next	= l_next,
	.stop	= l_stop,
	.show	= l_show,
};

static int lockdep_open(struct inode *inode, struct file *file)
{
	int res = seq_open(file, &lockdep_ops);
	if (!res) {
		struct seq_file *m = file->private_data;

		if (!list_empty(&all_lock_classes))
			m->private = list_entry(all_lock_classes.next,
					struct lock_class, lock_entry);
		else
			m->private = NULL;
	}
	return res;
}

static const struct file_operations proc_lockdep_operations = {
	.open		= lockdep_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

static void lockdep_stats_debug_show(struct seq_file *m)
{
#ifdef CONFIG_DEBUG_LOCKDEP
	unsigned int hi1 = debug_atomic_read(&hardirqs_on_events),
		     hi2 = debug_atomic_read(&hardirqs_off_events),
		     hr1 = debug_atomic_read(&redundant_hardirqs_on),
		     hr2 = debug_atomic_read(&redundant_hardirqs_off),
		     si1 = debug_atomic_read(&softirqs_on_events),
		     si2 = debug_atomic_read(&softirqs_off_events),
		     sr1 = debug_atomic_read(&redundant_softirqs_on),
		     sr2 = debug_atomic_read(&redundant_softirqs_off);

	seq_printf(m, " chain lookup misses:           %11u\n",
		debug_atomic_read(&chain_lookup_misses));
	seq_printf(m, " chain lookup hits:             %11u\n",
		debug_atomic_read(&chain_lookup_hits));
	seq_printf(m, " cyclic checks:                 %11u\n",
		debug_atomic_read(&nr_cyclic_checks));
	seq_printf(m, " cyclic-check recursions:       %11u\n",
		debug_atomic_read(&nr_cyclic_check_recursions));
	seq_printf(m, " find-mask forwards checks:     %11u\n",
		debug_atomic_read(&nr_find_usage_forwards_checks));
	seq_printf(m, " find-mask forwards recursions: %11u\n",
		debug_atomic_read(&nr_find_usage_forwards_recursions));
	seq_printf(m, " find-mask backwards checks:    %11u\n",
		debug_atomic_read(&nr_find_usage_backwards_checks));
	seq_printf(m, " find-mask backwards recursions:%11u\n",
		debug_atomic_read(&nr_find_usage_backwards_recursions));

	seq_printf(m, " hardirq on events:             %11u\n", hi1);
	seq_printf(m, " hardirq off events:            %11u\n", hi2);
	seq_printf(m, " redundant hardirq ons:         %11u\n", hr1);
	seq_printf(m, " redundant hardirq offs:        %11u\n", hr2);
	seq_printf(m, " softirq on events:             %11u\n", si1);
	seq_printf(m, " softirq off events:            %11u\n", si2);
	seq_printf(m, " redundant softirq ons:         %11u\n", sr1);
	seq_printf(m, " redundant softirq offs:        %11u\n", sr2);
#endif
}

static int lockdep_stats_show(struct seq_file *m, void *v)
{
	struct lock_class *class;
	unsigned long nr_unused = 0, nr_uncategorized = 0,
		      nr_irq_safe = 0, nr_irq_unsafe = 0,
		      nr_softirq_safe = 0, nr_softirq_unsafe = 0,
		      nr_hardirq_safe = 0, nr_hardirq_unsafe = 0,
		      nr_irq_read_safe = 0, nr_irq_read_unsafe = 0,
		      nr_softirq_read_safe = 0, nr_softirq_read_unsafe = 0,
		      nr_hardirq_read_safe = 0, nr_hardirq_read_unsafe = 0,
		      sum_forward_deps = 0, factor = 0;

	list_for_each_entry(class, &all_lock_classes, lock_entry) {

		if (class->usage_mask == 0)
			nr_unused++;
		if (class->usage_mask == LOCKF_USED)
			nr_uncategorized++;
		if (class->usage_mask & LOCKF_USED_IN_IRQ)
			nr_irq_safe++;
		if (class->usage_mask & LOCKF_ENABLED_IRQS)
			nr_irq_unsafe++;
		if (class->usage_mask & LOCKF_USED_IN_SOFTIRQ)
			nr_softirq_safe++;
		if (class->usage_mask & LOCKF_ENABLED_SOFTIRQS)
			nr_softirq_unsafe++;
		if (class->usage_mask & LOCKF_USED_IN_HARDIRQ)
			nr_hardirq_safe++;
		if (class->usage_mask & LOCKF_ENABLED_HARDIRQS)
			nr_hardirq_unsafe++;
		if (class->usage_mask & LOCKF_USED_IN_IRQ_READ)
			nr_irq_read_safe++;
		if (class->usage_mask & LOCKF_ENABLED_IRQS_READ)
			nr_irq_read_unsafe++;
		if (class->usage_mask & LOCKF_USED_IN_SOFTIRQ_READ)
			nr_softirq_read_safe++;
		if (class->usage_mask & LOCKF_ENABLED_SOFTIRQS_READ)
			nr_softirq_read_unsafe++;
		if (class->usage_mask & LOCKF_USED_IN_HARDIRQ_READ)
			nr_hardirq_read_safe++;
		if (class->usage_mask & LOCKF_ENABLED_HARDIRQS_READ)
			nr_hardirq_read_unsafe++;

		sum_forward_deps += count_forward_deps(class);
	}
#ifdef CONFIG_DEBUG_LOCKDEP
	DEBUG_LOCKS_WARN_ON(debug_atomic_read(&nr_unused_locks) != nr_unused);
#endif
	seq_printf(m, " lock-classes:                  %11lu [max: %lu]\n",
			nr_lock_classes, MAX_LOCKDEP_KEYS);
	seq_printf(m, " direct dependencies:           %11lu [max: %lu]\n",
			nr_list_entries, MAX_LOCKDEP_ENTRIES);
	seq_printf(m, " indirect dependencies:         %11lu\n",
			sum_forward_deps);

	/*
	 * Total number of dependencies:
	 *
	 * All irq-safe locks may nest inside irq-unsafe locks,
	 * plus all the other known dependencies:
	 */
	seq_printf(m, " all direct dependencies:       %11lu\n",
			nr_irq_unsafe * nr_irq_safe +
			nr_hardirq_unsafe * nr_hardirq_safe +
			nr_list_entries);

	/*
	 * Estimated factor between direct and indirect
	 * dependencies:
	 */
	if (nr_list_entries)
		factor = sum_forward_deps / nr_list_entries;

	seq_printf(m, " dependency chains:             %11lu [max: %lu]\n",
			nr_lock_chains, MAX_LOCKDEP_CHAINS);

#ifdef CONFIG_TRACE_IRQFLAGS
	seq_printf(m, " in-hardirq chains:             %11u\n",
			nr_hardirq_chains);
	seq_printf(m, " in-softirq chains:             %11u\n",
			nr_softirq_chains);
#endif
	seq_printf(m, " in-process chains:             %11u\n",
			nr_process_chains);
	seq_printf(m, " stack-trace entries:           %11lu [max: %lu]\n",
			nr_stack_trace_entries, MAX_STACK_TRACE_ENTRIES);
	seq_printf(m, " combined max dependencies:     %11u\n",
			(nr_hardirq_chains + 1) *
			(nr_softirq_chains + 1) *
			(nr_process_chains + 1)
	);
	seq_printf(m, " hardirq-safe locks:            %11lu\n",
			nr_hardirq_safe);
	seq_printf(m, " hardirq-unsafe locks:          %11lu\n",
			nr_hardirq_unsafe);
	seq_printf(m, " softirq-safe locks:            %11lu\n",
			nr_softirq_safe);
	seq_printf(m, " softirq-unsafe locks:          %11lu\n",
			nr_softirq_unsafe);
	seq_printf(m, " irq-safe locks:                %11lu\n",
			nr_irq_safe);
	seq_printf(m, " irq-unsafe locks:              %11lu\n",
			nr_irq_unsafe);

	seq_printf(m, " hardirq-read-safe locks:       %11lu\n",
			nr_hardirq_read_safe);
	seq_printf(m, " hardirq-read-unsafe locks:     %11lu\n",
			nr_hardirq_read_unsafe);
	seq_printf(m, " softirq-read-safe locks:       %11lu\n",
			nr_softirq_read_safe);
	seq_printf(m, " softirq-read-unsafe locks:     %11lu\n",
			nr_softirq_read_unsafe);
	seq_printf(m, " irq-read-safe locks:           %11lu\n",
			nr_irq_read_safe);
	seq_printf(m, " irq-read-unsafe locks:         %11lu\n",
			nr_irq_read_unsafe);

	seq_printf(m, " uncategorized locks:           %11lu\n",
			nr_uncategorized);
	seq_printf(m, " unused locks:                  %11lu\n",
			nr_unused);
	seq_printf(m, " max locking depth:             %11u\n",
			max_lockdep_depth);
	seq_printf(m, " max recursion depth:           %11u\n",
			max_recursion_depth);
	lockdep_stats_debug_show(m);
	seq_printf(m, " debug_locks:                   %11u\n",
			debug_locks);

	return 0;
}

static int lockdep_stats_open(struct inode *inode, struct file *file)
{
	return single_open(file, lockdep_stats_show, NULL);
}

static const struct file_operations proc_lockdep_stats_operations = {
	.open		= lockdep_stats_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

static int __init lockdep_proc_init(void)
{
	struct proc_dir_entry *entry;

	entry = create_proc_entry("lockdep", S_IRUSR, NULL);
	if (entry)
		entry->proc_fops = &proc_lockdep_operations;

	entry = create_proc_entry("lockdep_stats", S_IRUSR, NULL);
	if (entry)
		entry->proc_fops = &proc_lockdep_stats_operations;

	return 0;
}

__initcall(lockdep_proc_init);
Commit	Line	Data
a8f24a39 IM	1	/*
	2	* kernel/lockdep_proc.c
	3	*
	4	* Runtime locking correctness validator
	5	*
	6	* Started by Ingo Molnar:
	7	*
	8	* Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
	9	*
	10	* Code for /proc/lockdep and /proc/lockdep_stats:
	11	*
	12	*/
a8f24a39 IM	13	#include <linux/module.h>
	14	#include <linux/proc_fs.h>
	15	#include <linux/seq_file.h>
	16	#include <linux/kallsyms.h>
	17	#include <linux/debug_locks.h>
	18
	19	#include "lockdep_internals.h"
	20
	21	static void l_next(struct seq_file m, void v, loff_t pos)
	22	{
	23	struct lock_class *class = v;
	24
	25	(*pos)++;
	26
	27	if (class->lock_entry.next != &all_lock_classes)
	28	class = list_entry(class->lock_entry.next, struct lock_class,
	29	lock_entry);
	30	else
	31	class = NULL;
	32	m->private = class;
	33
	34	return class;
	35	}
	36
	37	static void l_start(struct seq_file m, loff_t *pos)
	38	{
	39	struct lock_class *class = m->private;
	40
	41	if (&class->lock_entry == all_lock_classes.next)
	42	seq_printf(m, "all lock classes:\n");
	43
	44	return class;
	45	}
	46
	47	static void l_stop(struct seq_file m, void v)
	48	{
	49	}
	50
	51	static unsigned long count_forward_deps(struct lock_class *class)
	52	{
	53	struct lock_list *entry;
	54	unsigned long ret = 1;
	55
	56	/*
	57	* Recurse this class's dependency list:
	58	*/
	59	list_for_each_entry(entry, &class->locks_after, entry)
	60	ret += count_forward_deps(entry->class);
	61
	62	return ret;
	63	}
	64
	65	static unsigned long count_backward_deps(struct lock_class *class)
	66	{
	67	struct lock_list *entry;
	68	unsigned long ret = 1;
	69
	70	/*
	71	* Recurse this class's dependency list:
	72	*/
	73	list_for_each_entry(entry, &class->locks_before, entry)
	74	ret += count_backward_deps(entry->class);
	75
	76	return ret;
77	}
78
068135e6 JB	79	static void print_name(struct seq_file m, struct lock_class class)
	80	{
	81	char str[128];
	82	const char *name = class->name;
	83
	84	if (!name) {
	85	name = __get_key_name(class->key, str);
	86	seq_printf(m, "%s", name);
	87	} else{
	88	seq_printf(m, "%s", name);
	89	if (class->name_version > 1)
	90	seq_printf(m, "#%d", class->name_version);
	91	if (class->subclass)
	92	seq_printf(m, "/%d", class->subclass);
	93	}
	94	}
	95
a8f24a39 IM	96	static int l_show(struct seq_file m, void v)
	97	{
	98	unsigned long nr_forward_deps, nr_backward_deps;
	99	struct lock_class *class = m->private;
068135e6 JB	100	struct lock_list *entry;
068135e6 JB	101	char c1, c2, c3, c4;
a8f24a39 IM	102
	103	seq_printf(m, "%p", class->key);
	104	#ifdef CONFIG_DEBUG_LOCKDEP
	105	seq_printf(m, " OPS:%8ld", class->ops);
	106	#endif
	107	nr_forward_deps = count_forward_deps(class);
	108	seq_printf(m, " FD:%5ld", nr_forward_deps);
	109
	110	nr_backward_deps = count_backward_deps(class);
	111	seq_printf(m, " BD:%5ld", nr_backward_deps);
	112
	113	get_usage_chars(class, &c1, &c2, &c3, &c4);
	114	seq_printf(m, " %c%c%c%c", c1, c2, c3, c4);
	115
068135e6 JB	116	seq_printf(m, ": ");
	117	print_name(m, class);
	118	seq_puts(m, "\n");
	119
	120	list_for_each_entry(entry, &class->locks_after, entry) {
	121	if (entry->distance == 1) {
	122	seq_printf(m, " -> [%p] ", entry->class);
	123	print_name(m, entry->class);
	124	seq_puts(m, "\n");
	125	}
a8f24a39 IM	126	}
	127	seq_puts(m, "\n");
	128
	129	return 0;
	130	}
	131
15ad7cdc	132	static const struct seq_operations lockdep_ops = {
a8f24a39 IM	133	.start = l_start,
	134	.next = l_next,
	135	.stop = l_stop,
	136	.show = l_show,
	137	};
	138
	139	static int lockdep_open(struct inode inode, struct file file)
	140	{
	141	int res = seq_open(file, &lockdep_ops);
	142	if (!res) {
	143	struct seq_file *m = file->private_data;
	144
	145	if (!list_empty(&all_lock_classes))
	146	m->private = list_entry(all_lock_classes.next,
	147	struct lock_class, lock_entry);
	148	else
	149	m->private = NULL;
	150	}
	151	return res;
	152	}
	153
15ad7cdc	154	static const struct file_operations proc_lockdep_operations = {
a8f24a39 IM	155	.open = lockdep_open,
	156	.read = seq_read,
	157	.llseek = seq_lseek,
	158	.release = seq_release,
	159	};
	160
	161	static void lockdep_stats_debug_show(struct seq_file *m)
	162	{
	163	#ifdef CONFIG_DEBUG_LOCKDEP
	164	unsigned int hi1 = debug_atomic_read(&hardirqs_on_events),
	165	hi2 = debug_atomic_read(&hardirqs_off_events),
	166	hr1 = debug_atomic_read(&redundant_hardirqs_on),
	167	hr2 = debug_atomic_read(&redundant_hardirqs_off),
	168	si1 = debug_atomic_read(&softirqs_on_events),
	169	si2 = debug_atomic_read(&softirqs_off_events),
	170	sr1 = debug_atomic_read(&redundant_softirqs_on),
	171	sr2 = debug_atomic_read(&redundant_softirqs_off);
	172
	173	seq_printf(m, " chain lookup misses: %11u\n",
	174	debug_atomic_read(&chain_lookup_misses));
	175	seq_printf(m, " chain lookup hits: %11u\n",
	176	debug_atomic_read(&chain_lookup_hits));
	177	seq_printf(m, " cyclic checks: %11u\n",
	178	debug_atomic_read(&nr_cyclic_checks));
	179	seq_printf(m, " cyclic-check recursions: %11u\n",
	180	debug_atomic_read(&nr_cyclic_check_recursions));
	181	seq_printf(m, " find-mask forwards checks: %11u\n",
	182	debug_atomic_read(&nr_find_usage_forwards_checks));
	183	seq_printf(m, " find-mask forwards recursions: %11u\n",
	184	debug_atomic_read(&nr_find_usage_forwards_recursions));
	185	seq_printf(m, " find-mask backwards checks: %11u\n",
	186	debug_atomic_read(&nr_find_usage_backwards_checks));
	187	seq_printf(m, " find-mask backwards recursions:%11u\n",
	188	debug_atomic_read(&nr_find_usage_backwards_recursions));
	189
	190	seq_printf(m, " hardirq on events: %11u\n", hi1);
	191	seq_printf(m, " hardirq off events: %11u\n", hi2);
	192	seq_printf(m, " redundant hardirq ons: %11u\n", hr1);
	193	seq_printf(m, " redundant hardirq offs: %11u\n", hr2);
	194	seq_printf(m, " softirq on events: %11u\n", si1);
	195	seq_printf(m, " softirq off events: %11u\n", si2);
	196	seq_printf(m, " redundant softirq ons: %11u\n", sr1);
	197	seq_printf(m, " redundant softirq offs: %11u\n", sr2);
	198	#endif
	199	}
	200
	201	static int lockdep_stats_show(struct seq_file m, void v)
	202	{
	203	struct lock_class *class;
	204	unsigned long nr_unused = 0, nr_uncategorized = 0,
	205	nr_irq_safe = 0, nr_irq_unsafe = 0,
	206	nr_softirq_safe = 0, nr_softirq_unsafe = 0,
	207	nr_hardirq_safe = 0, nr_hardirq_unsafe = 0,
	208	nr_irq_read_safe = 0, nr_irq_read_unsafe = 0,
	209	nr_softirq_read_safe = 0, nr_softirq_read_unsafe = 0,
	210	nr_hardirq_read_safe = 0, nr_hardirq_read_unsafe = 0,
	211	sum_forward_deps = 0, factor = 0;
	212
	213	list_for_each_entry(class, &all_lock_classes, lock_entry) {
	214
	215	if (class->usage_mask == 0)
	216	nr_unused++;
	217	if (class->usage_mask == LOCKF_USED)
	218	nr_uncategorized++;
219	if (class->usage_mask & LOCKF_USED_IN_IRQ)
220	nr_irq_safe++;
221	if (class->usage_mask & LOCKF_ENABLED_IRQS)
222	nr_irq_unsafe++;
223	if (class->usage_mask & LOCKF_USED_IN_SOFTIRQ)
224	nr_softirq_safe++;
225	if (class->usage_mask & LOCKF_ENABLED_SOFTIRQS)
226	nr_softirq_unsafe++;
227	if (class->usage_mask & LOCKF_USED_IN_HARDIRQ)
228	nr_hardirq_safe++;
229	if (class->usage_mask & LOCKF_ENABLED_HARDIRQS)
230	nr_hardirq_unsafe++;
231	if (class->usage_mask & LOCKF_USED_IN_IRQ_READ)
232	nr_irq_read_safe++;
233	if (class->usage_mask & LOCKF_ENABLED_IRQS_READ)
234	nr_irq_read_unsafe++;
235	if (class->usage_mask & LOCKF_USED_IN_SOFTIRQ_READ)
236	nr_softirq_read_safe++;
237	if (class->usage_mask & LOCKF_ENABLED_SOFTIRQS_READ)
238	nr_softirq_read_unsafe++;
239	if (class->usage_mask & LOCKF_USED_IN_HARDIRQ_READ)
240	nr_hardirq_read_safe++;
241	if (class->usage_mask & LOCKF_ENABLED_HARDIRQS_READ)
242	nr_hardirq_read_unsafe++;
243
244	sum_forward_deps += count_forward_deps(class);
245	}
501b9ebf	246	#ifdef CONFIG_DEBUG_LOCKDEP
a8f24a39 IM	247	DEBUG_LOCKS_WARN_ON(debug_atomic_read(&nr_unused_locks) != nr_unused);
	248	#endif
	249	seq_printf(m, " lock-classes: %11lu [max: %lu]\n",
	250	nr_lock_classes, MAX_LOCKDEP_KEYS);
	251	seq_printf(m, " direct dependencies: %11lu [max: %lu]\n",
	252	nr_list_entries, MAX_LOCKDEP_ENTRIES);
	253	seq_printf(m, " indirect dependencies: %11lu\n",
	254	sum_forward_deps);
	255
	256	/*
	257	* Total number of dependencies:
	258	*
	259	* All irq-safe locks may nest inside irq-unsafe locks,
	260	* plus all the other known dependencies:
	261	*/
	262	seq_printf(m, " all direct dependencies: %11lu\n",
	263	nr_irq_unsafe * nr_irq_safe +
	264	nr_hardirq_unsafe * nr_hardirq_safe +
	265	nr_list_entries);
	266
	267	/*
	268	* Estimated factor between direct and indirect
	269	* dependencies:
	270	*/
	271	if (nr_list_entries)
	272	factor = sum_forward_deps / nr_list_entries;
	273
	274	seq_printf(m, " dependency chains: %11lu [max: %lu]\n",
	275	nr_lock_chains, MAX_LOCKDEP_CHAINS);
	276
	277	#ifdef CONFIG_TRACE_IRQFLAGS
	278	seq_printf(m, " in-hardirq chains: %11u\n",
	279	nr_hardirq_chains);
	280	seq_printf(m, " in-softirq chains: %11u\n",
	281	nr_softirq_chains);
	282	#endif
	283	seq_printf(m, " in-process chains: %11u\n",
	284	nr_process_chains);
	285	seq_printf(m, " stack-trace entries: %11lu [max: %lu]\n",
	286	nr_stack_trace_entries, MAX_STACK_TRACE_ENTRIES);
	287	seq_printf(m, " combined max dependencies: %11u\n",
	288	(nr_hardirq_chains + 1) *
	289	(nr_softirq_chains + 1) *
	290	(nr_process_chains + 1)
	291	);
	292	seq_printf(m, " hardirq-safe locks: %11lu\n",
	293	nr_hardirq_safe);
	294	seq_printf(m, " hardirq-unsafe locks: %11lu\n",
	295	nr_hardirq_unsafe);
	296	seq_printf(m, " softirq-safe locks: %11lu\n",
	297	nr_softirq_safe);
	298	seq_printf(m, " softirq-unsafe locks: %11lu\n",
	299	nr_softirq_unsafe);
	300	seq_printf(m, " irq-safe locks: %11lu\n",
	301	nr_irq_safe);
	302	seq_printf(m, " irq-unsafe locks: %11lu\n",
	303	nr_irq_unsafe);
	304
	305	seq_printf(m, " hardirq-read-safe locks: %11lu\n",
	306	nr_hardirq_read_safe);
	307	seq_printf(m, " hardirq-read-unsafe locks: %11lu\n",
	308	nr_hardirq_read_unsafe);
	309	seq_printf(m, " softirq-read-safe locks: %11lu\n",
	310	nr_softirq_read_safe);
311	seq_printf(m, " softirq-read-unsafe locks: %11lu\n",
312	nr_softirq_read_unsafe);
313	seq_printf(m, " irq-read-safe locks: %11lu\n",
314	nr_irq_read_safe);
315	seq_printf(m, " irq-read-unsafe locks: %11lu\n",
316	nr_irq_read_unsafe);
317
318	seq_printf(m, " uncategorized locks: %11lu\n",
319	nr_uncategorized);
320	seq_printf(m, " unused locks: %11lu\n",
321	nr_unused);
322	seq_printf(m, " max locking depth: %11u\n",
323	max_lockdep_depth);
324	seq_printf(m, " max recursion depth: %11u\n",
325	max_recursion_depth);
326	lockdep_stats_debug_show(m);
327	seq_printf(m, " debug_locks: %11u\n",
328	debug_locks);
329
330	return 0;
331	}
332
333	static int lockdep_stats_open(struct inode inode, struct file file)
334	{
335	return single_open(file, lockdep_stats_show, NULL);
336	}
337
15ad7cdc	338	static const struct file_operations proc_lockdep_stats_operations = {
a8f24a39 IM	339	.open = lockdep_stats_open,
	340	.read = seq_read,
	341	.llseek = seq_lseek,
	342	.release = seq_release,
	343	};
	344
	345	static int __init lockdep_proc_init(void)
	346	{
	347	struct proc_dir_entry *entry;
	348
	349	entry = create_proc_entry("lockdep", S_IRUSR, NULL);
	350	if (entry)
	351	entry->proc_fops = &proc_lockdep_operations;
	352
	353	entry = create_proc_entry("lockdep_stats", S_IRUSR, NULL);
	354	if (entry)
	355	entry->proc_fops = &proc_lockdep_stats_operations;
	356
	357	return 0;
	358	}
	359
	360	__initcall(lockdep_proc_init);
	361