// SPDX-License-Identifier: GPL-2.0-only /* * lib/debug_locks.c * * Generic place for common debugging facilities for various locks: * spinlocks, rwlocks, mutexes and rwsems. * * Started by Ingo Molnar: * * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> */ #include <linux/rwsem.h> #include <linux/mutex.h> #include <linux/export.h> #include <linux/spinlock.h> #include <linux/debug_locks.h> /* * We want to turn all lock-debugging facilities on/off at once, * via a global flag. The reason is that once a single bug has been * detected and reported, there might be cascade of followup bugs * that would just muddy the log. So we report the first one and * shut up after that. */ int debug_locks __read_mostly = 1; EXPORT_SYMBOL_GPL(debug_locks); /* * The locking-testsuite uses <debug_locks_silent> to get a * 'silent failure': nothing is printed to the console when * a locking bug is detected. */ int debug_locks_silent __read_mostly; EXPORT_SYMBOL_GPL(debug_locks_silent); /* * Generic 'turn off all lock debugging' function: */ int debug_locks_off(void) { if (debug_locks && __debug_locks_off()) { if (!debug_locks_silent) { console_verbose(); return 1; } } return 0; } EXPORT_SYMBOL_GPL(debug_locks_off);