[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/sched.h>
#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_LOCKDEP_DEBUG
	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	*/
	13	#include <linux/sched.h>
	14	#include <linux/module.h>
	15	#include <linux/proc_fs.h>
	16	#include <linux/seq_file.h>
	17	#include <linux/kallsyms.h>
	18	#include <linux/debug_locks.h>
	19
	20	#include "lockdep_internals.h"
	21
	22	static void l_next(struct seq_file m, void v, loff_t pos)
	23	{
	24	struct lock_class *class = v;
	25
	26	(*pos)++;
	27
	28	if (class->lock_entry.next != &all_lock_classes)
	29	class = list_entry(class->lock_entry.next, struct lock_class,
	30	lock_entry);
	31	else
	32	class = NULL;
	33	m->private = class;
	34
	35	return class;
	36	}
	37
	38	static void l_start(struct seq_file m, loff_t *pos)
	39	{
	40	struct lock_class *class = m->private;
	41
	42	if (&class->lock_entry == all_lock_classes.next)
	43	seq_printf(m, "all lock classes:\n");
	44
	45	return class;
	46	}
	47
	48	static void l_stop(struct seq_file m, void v)
	49	{
	50	}
	51
	52	static unsigned long count_forward_deps(struct lock_class *class)
	53	{
	54	struct lock_list *entry;
	55	unsigned long ret = 1;
	56
	57	/*
	58	* Recurse this class's dependency list:
	59	*/
	60	list_for_each_entry(entry, &class->locks_after, entry)
	61	ret += count_forward_deps(entry->class);
	62
	63	return ret;
	64	}
65
66	static unsigned long count_backward_deps(struct lock_class *class)
67	{
68	struct lock_list *entry;
69	unsigned long ret = 1;
70
71	/*
72	* Recurse this class's dependency list:
73	*/
74	list_for_each_entry(entry, &class->locks_before, entry)
75	ret += count_backward_deps(entry->class);
76
77	return ret;
78	}
79
068135e6 JB	80	static void print_name(struct seq_file m, struct lock_class class)
	81	{
	82	char str[128];
	83	const char *name = class->name;
	84
	85	if (!name) {
	86	name = __get_key_name(class->key, str);
	87	seq_printf(m, "%s", name);
	88	} else{
	89	seq_printf(m, "%s", name);
	90	if (class->name_version > 1)
	91	seq_printf(m, "#%d", class->name_version);
	92	if (class->subclass)
	93	seq_printf(m, "/%d", class->subclass);
	94	}
	95	}
	96
a8f24a39 IM	97	static int l_show(struct seq_file m, void v)
	98	{
	99	unsigned long nr_forward_deps, nr_backward_deps;
	100	struct lock_class *class = m->private;
068135e6 JB	101	struct lock_list *entry;
068135e6 JB	102	char c1, c2, c3, c4;
a8f24a39 IM	103
	104	seq_printf(m, "%p", class->key);
	105	#ifdef CONFIG_DEBUG_LOCKDEP
	106	seq_printf(m, " OPS:%8ld", class->ops);
	107	#endif
	108	nr_forward_deps = count_forward_deps(class);
	109	seq_printf(m, " FD:%5ld", nr_forward_deps);
	110
	111	nr_backward_deps = count_backward_deps(class);
	112	seq_printf(m, " BD:%5ld", nr_backward_deps);
	113
	114	get_usage_chars(class, &c1, &c2, &c3, &c4);
	115	seq_printf(m, " %c%c%c%c", c1, c2, c3, c4);
	116
068135e6 JB	117	seq_printf(m, ": ");
	118	print_name(m, class);
	119	seq_puts(m, "\n");
	120
	121	list_for_each_entry(entry, &class->locks_after, entry) {
	122	if (entry->distance == 1) {
	123	seq_printf(m, " -> [%p] ", entry->class);
	124	print_name(m, entry->class);
	125	seq_puts(m, "\n");
	126	}
a8f24a39 IM	127	}
	128	seq_puts(m, "\n");
	129
	130	return 0;
	131	}
	132
15ad7cdc	133	static const struct seq_operations lockdep_ops = {
a8f24a39 IM	134	.start = l_start,
	135	.next = l_next,
	136	.stop = l_stop,
	137	.show = l_show,
	138	};
	139
	140	static int lockdep_open(struct inode inode, struct file file)
	141	{
	142	int res = seq_open(file, &lockdep_ops);
	143	if (!res) {
	144	struct seq_file *m = file->private_data;
	145
	146	if (!list_empty(&all_lock_classes))
	147	m->private = list_entry(all_lock_classes.next,
	148	struct lock_class, lock_entry);
	149	else
	150	m->private = NULL;
	151	}
	152	return res;
	153	}
	154
15ad7cdc	155	static const struct file_operations proc_lockdep_operations = {
a8f24a39 IM	156	.open = lockdep_open,
	157	.read = seq_read,
	158	.llseek = seq_lseek,
	159	.release = seq_release,
	160	};
	161
	162	static void lockdep_stats_debug_show(struct seq_file *m)
	163	{
	164	#ifdef CONFIG_DEBUG_LOCKDEP
	165	unsigned int hi1 = debug_atomic_read(&hardirqs_on_events),
	166	hi2 = debug_atomic_read(&hardirqs_off_events),
	167	hr1 = debug_atomic_read(&redundant_hardirqs_on),
	168	hr2 = debug_atomic_read(&redundant_hardirqs_off),
	169	si1 = debug_atomic_read(&softirqs_on_events),
	170	si2 = debug_atomic_read(&softirqs_off_events),
	171	sr1 = debug_atomic_read(&redundant_softirqs_on),
	172	sr2 = debug_atomic_read(&redundant_softirqs_off);
	173
	174	seq_printf(m, " chain lookup misses: %11u\n",
	175	debug_atomic_read(&chain_lookup_misses));
	176	seq_printf(m, " chain lookup hits: %11u\n",
	177	debug_atomic_read(&chain_lookup_hits));
	178	seq_printf(m, " cyclic checks: %11u\n",
	179	debug_atomic_read(&nr_cyclic_checks));
	180	seq_printf(m, " cyclic-check recursions: %11u\n",
	181	debug_atomic_read(&nr_cyclic_check_recursions));
	182	seq_printf(m, " find-mask forwards checks: %11u\n",
	183	debug_atomic_read(&nr_find_usage_forwards_checks));
	184	seq_printf(m, " find-mask forwards recursions: %11u\n",
	185	debug_atomic_read(&nr_find_usage_forwards_recursions));
	186	seq_printf(m, " find-mask backwards checks: %11u\n",
	187	debug_atomic_read(&nr_find_usage_backwards_checks));
	188	seq_printf(m, " find-mask backwards recursions:%11u\n",
	189	debug_atomic_read(&nr_find_usage_backwards_recursions));
	190
	191	seq_printf(m, " hardirq on events: %11u\n", hi1);
	192	seq_printf(m, " hardirq off events: %11u\n", hi2);
	193	seq_printf(m, " redundant hardirq ons: %11u\n", hr1);
	194	seq_printf(m, " redundant hardirq offs: %11u\n", hr2);
	195	seq_printf(m, " softirq on events: %11u\n", si1);
	196	seq_printf(m, " softirq off events: %11u\n", si2);
	197	seq_printf(m, " redundant softirq ons: %11u\n", sr1);
	198	seq_printf(m, " redundant softirq offs: %11u\n", sr2);
	199	#endif
	200	}
	201
	202	static int lockdep_stats_show(struct seq_file m, void v)
	203	{
	204	struct lock_class *class;
	205	unsigned long nr_unused = 0, nr_uncategorized = 0,
	206	nr_irq_safe = 0, nr_irq_unsafe = 0,
	207	nr_softirq_safe = 0, nr_softirq_unsafe = 0,
	208	nr_hardirq_safe = 0, nr_hardirq_unsafe = 0,
	209	nr_irq_read_safe = 0, nr_irq_read_unsafe = 0,
	210	nr_softirq_read_safe = 0, nr_softirq_read_unsafe = 0,
	211	nr_hardirq_read_safe = 0, nr_hardirq_read_unsafe = 0,
	212	sum_forward_deps = 0, factor = 0;
	213
	214	list_for_each_entry(class, &all_lock_classes, lock_entry) {
	215
	216	if (class->usage_mask == 0)
	217	nr_unused++;
	218	if (class->usage_mask == LOCKF_USED)
	219	nr_uncategorized++;
220	if (class->usage_mask & LOCKF_USED_IN_IRQ)
221	nr_irq_safe++;
222	if (class->usage_mask & LOCKF_ENABLED_IRQS)
223	nr_irq_unsafe++;
224	if (class->usage_mask & LOCKF_USED_IN_SOFTIRQ)
225	nr_softirq_safe++;
226	if (class->usage_mask & LOCKF_ENABLED_SOFTIRQS)
227	nr_softirq_unsafe++;
228	if (class->usage_mask & LOCKF_USED_IN_HARDIRQ)
229	nr_hardirq_safe++;
230	if (class->usage_mask & LOCKF_ENABLED_HARDIRQS)
231	nr_hardirq_unsafe++;
232	if (class->usage_mask & LOCKF_USED_IN_IRQ_READ)
233	nr_irq_read_safe++;
234	if (class->usage_mask & LOCKF_ENABLED_IRQS_READ)
235	nr_irq_read_unsafe++;
236	if (class->usage_mask & LOCKF_USED_IN_SOFTIRQ_READ)
237	nr_softirq_read_safe++;
238	if (class->usage_mask & LOCKF_ENABLED_SOFTIRQS_READ)
239	nr_softirq_read_unsafe++;
240	if (class->usage_mask & LOCKF_USED_IN_HARDIRQ_READ)
241	nr_hardirq_read_safe++;
242	if (class->usage_mask & LOCKF_ENABLED_HARDIRQS_READ)
243	nr_hardirq_read_unsafe++;
244
245	sum_forward_deps += count_forward_deps(class);
246	}
247	#ifdef CONFIG_LOCKDEP_DEBUG
248	DEBUG_LOCKS_WARN_ON(debug_atomic_read(&nr_unused_locks) != nr_unused);
249	#endif
250	seq_printf(m, " lock-classes: %11lu [max: %lu]\n",
251	nr_lock_classes, MAX_LOCKDEP_KEYS);
252	seq_printf(m, " direct dependencies: %11lu [max: %lu]\n",
253	nr_list_entries, MAX_LOCKDEP_ENTRIES);
254	seq_printf(m, " indirect dependencies: %11lu\n",
255	sum_forward_deps);
256
257	/*
258	* Total number of dependencies:
259	*
260	* All irq-safe locks may nest inside irq-unsafe locks,
261	* plus all the other known dependencies:
262	*/
263	seq_printf(m, " all direct dependencies: %11lu\n",
264	nr_irq_unsafe * nr_irq_safe +
265	nr_hardirq_unsafe * nr_hardirq_safe +
266	nr_list_entries);
267
268	/*
269	* Estimated factor between direct and indirect
270	* dependencies:
271	*/
272	if (nr_list_entries)
273	factor = sum_forward_deps / nr_list_entries;
274
275	seq_printf(m, " dependency chains: %11lu [max: %lu]\n",
276	nr_lock_chains, MAX_LOCKDEP_CHAINS);
277
278	#ifdef CONFIG_TRACE_IRQFLAGS
279	seq_printf(m, " in-hardirq chains: %11u\n",
280	nr_hardirq_chains);
281	seq_printf(m, " in-softirq chains: %11u\n",
282	nr_softirq_chains);
283	#endif
284	seq_printf(m, " in-process chains: %11u\n",
285	nr_process_chains);
286	seq_printf(m, " stack-trace entries: %11lu [max: %lu]\n",
287	nr_stack_trace_entries, MAX_STACK_TRACE_ENTRIES);
288	seq_printf(m, " combined max dependencies: %11u\n",
289	(nr_hardirq_chains + 1) *
290	(nr_softirq_chains + 1) *
291	(nr_process_chains + 1)
292	);
293	seq_printf(m, " hardirq-safe locks: %11lu\n",
294	nr_hardirq_safe);
295	seq_printf(m, " hardirq-unsafe locks: %11lu\n",
296	nr_hardirq_unsafe);
297	seq_printf(m, " softirq-safe locks: %11lu\n",
298	nr_softirq_safe);
299	seq_printf(m, " softirq-unsafe locks: %11lu\n",
300	nr_softirq_unsafe);
301	seq_printf(m, " irq-safe locks: %11lu\n",
302	nr_irq_safe);
303	seq_printf(m, " irq-unsafe locks: %11lu\n",
304	nr_irq_unsafe);
305
306	seq_printf(m, " hardirq-read-safe locks: %11lu\n",
307	nr_hardirq_read_safe);
308	seq_printf(m, " hardirq-read-unsafe locks: %11lu\n",
309	nr_hardirq_read_unsafe);
310	seq_printf(m, " softirq-read-safe locks: %11lu\n",
311	nr_softirq_read_safe);
312	seq_printf(m, " softirq-read-unsafe locks: %11lu\n",
313	nr_softirq_read_unsafe);
314	seq_printf(m, " irq-read-safe locks: %11lu\n",
315	nr_irq_read_safe);
316	seq_printf(m, " irq-read-unsafe locks: %11lu\n",
317	nr_irq_read_unsafe);
318
319	seq_printf(m, " uncategorized locks: %11lu\n",
320	nr_uncategorized);
321	seq_printf(m, " unused locks: %11lu\n",
322	nr_unused);
323	seq_printf(m, " max locking depth: %11u\n",
324	max_lockdep_depth);
325	seq_printf(m, " max recursion depth: %11u\n",
326	max_recursion_depth);
327	lockdep_stats_debug_show(m);
328	seq_printf(m, " debug_locks: %11u\n",
329	debug_locks);
330
331	return 0;
332	}
333
334	static int lockdep_stats_open(struct inode inode, struct file file)
335	{
336	return single_open(file, lockdep_stats_show, NULL);
337	}
338
15ad7cdc	339	static const struct file_operations proc_lockdep_stats_operations = {
a8f24a39 IM	340	.open = lockdep_stats_open,
	341	.read = seq_read,
	342	.llseek = seq_lseek,
	343	.release = seq_release,
	344	};
	345
	346	static int __init lockdep_proc_init(void)
	347	{
	348	struct proc_dir_entry *entry;
	349
	350	entry = create_proc_entry("lockdep", S_IRUSR, NULL);
	351	if (entry)
	352	entry->proc_fops = &proc_lockdep_operations;
	353
	354	entry = create_proc_entry("lockdep_stats", S_IRUSR, NULL);
	355	if (entry)
	356	entry->proc_fops = &proc_lockdep_stats_operations;
	357
	358	return 0;
	359	}
	360
	361	__initcall(lockdep_proc_init);
	362