Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * 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/module.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 = 1;

/*

 * 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;

/*

 * Generic 'turn off all lock debugging' function:

 */

int debug_locks_off(void)

{

        if (xchg(&debug_locks, 0)) {

                if (!debug_locks_silent) {

                        console_verbose();

                        return 1;

                }

        }

        return 0;

}