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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * lib/debug_locks.c4 *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 been21 * detected and reported, there might be cascade of followup bugs22 * that would just muddy the log. So we report the first one and23 * 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 a30 * 'silent failure': nothing is printed to the console when31 * 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 */39int 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);50