FreeBSD/Linux Kernel Cross Reference
sys/lib/debug_locks.c

     /*
      * 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 = 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;
    
    /*
     * Generic 'turn off all lock debugging' function:
     */
    int debug_locks_off(void)
    {
            if (__debug_locks_off()) {
                    if (!debug_locks_silent) {
                            console_verbose();
                            return 1;
                    }
            }
            return 0;
    }

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