kernel/lockdep_proc.c - maze/linux - Git at Google

 /*
  * 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 int l_show(struct seq_file *m, void *v)
 {
 	unsigned long nr_forward_deps, nr_backward_deps;
 	struct lock_class *class = m->private;
 	char str[128], c1, c2, c3, c4;
 	const char *name;

 	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);

 	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);
 	}
 	seq_puts(m, "\n");

 	return 0;
 }

 static 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 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 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);
	/*
	* 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 int l_show(struct seq_file m, void v)
	{
	unsigned long nr_forward_deps, nr_backward_deps;
	struct lock_class *class = m->private;
	char str[128], c1, c2, c3, c4;
	const char *name;

	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);

	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);
	}
	seq_puts(m, "\n");

	return 0;
	}

	static 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 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 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);