// 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:
   */

  noinstr 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);