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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950// 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);