1/*
 2 * lib/debug_locks.c
 3 *
 4 * Generic place for common debugging facilities for various locks:
 5 * spinlocks, rwlocks, mutexes and rwsems.
 6 *
 7 * Started by Ingo Molnar:
 8 *
 9 *  Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
10 */
11#include <linux/rwsem.h>
12#include <linux/mutex.h>
13#include <linux/export.h>
14#include <linux/spinlock.h>
15#include <linux/debug_locks.h>
16
17/*
18 * We want to turn all lock-debugging facilities on/off at once,
19 * via a global flag. The reason is that once a single bug has been
20 * detected and reported, there might be cascade of followup bugs
21 * that would just muddy the log. So we report the first one and
22 * shut up after that.
23 */
24int debug_locks = 1;
25EXPORT_SYMBOL_GPL(debug_locks);
26
27/*
28 * The locking-testsuite uses <debug_locks_silent> to get a
29 * 'silent failure': nothing is printed to the console when
30 * a locking bug is detected.
31 */
32int debug_locks_silent;
33EXPORT_SYMBOL_GPL(debug_locks_silent);
34
35/*
36 * Generic 'turn off all lock debugging' function:
37 */
38int debug_locks_off(void)
39{
40	if (__debug_locks_off()) {
41		if (!debug_locks_silent) {
42			console_verbose();
43			return 1;
44		}
45	}
46	return 0;
47}
48EXPORT_SYMBOL_GPL(debug_locks_off);

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * lib/debug_locks.c
 4 *
 5 * Generic place for common debugging facilities for various locks:
 6 * spinlocks, rwlocks, mutexes and rwsems.
 7 *
 8 * Started by Ingo Molnar:
 9 *
10 *  Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
11 */
12#include <linux/rwsem.h>
13#include <linux/mutex.h>
14#include <linux/export.h>
15#include <linux/spinlock.h>
16#include <linux/debug_locks.h>
17
18/*
19 * We want to turn all lock-debugging facilities on/off at once,
20 * via a global flag. The reason is that once a single bug has been
21 * detected and reported, there might be cascade of followup bugs
22 * that would just muddy the log. So we report the first one and
23 * shut up after that.
24 */
25int debug_locks __read_mostly = 1;
26EXPORT_SYMBOL_GPL(debug_locks);
27
28/*
29 * The locking-testsuite uses <debug_locks_silent> to get a
30 * 'silent failure': nothing is printed to the console when
31 * a locking bug is detected.
32 */
33int debug_locks_silent __read_mostly;
34EXPORT_SYMBOL_GPL(debug_locks_silent);
35
36/*
37 * Generic 'turn off all lock debugging' function:
38 */
39noinstr int debug_locks_off(void)
40{
41	if (debug_locks && __debug_locks_off()) {
42		if (!debug_locks_silent) {
43			console_verbose();
44			return 1;
45		}
46	}
47	return 0;
48}
49EXPORT_SYMBOL_GPL(debug_locks_off);