kernel/locking/rtmutex-debug.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * RT-Mutexes: blocking mutual exclusion locks with PI support
   4  *
   5  * started by Ingo Molnar and Thomas Gleixner:
   6  *
   7  *  Copyright (C) 2004-2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
   8  *  Copyright (C) 2006, Timesys Corp., Thomas Gleixner <tglx@timesys.com>
   9  *
  10  * This file contains macros used solely by rtmutex.c. Debug version.
  11  */
  12
  13 extern void debug_rt_mutex_init_waiter(struct rt_mutex_waiter *waiter);
  14 extern void debug_rt_mutex_free_waiter(struct rt_mutex_waiter *waiter);
  15 extern void debug_rt_mutex_init(struct rt_mutex *lock, const char *name, struct lock_class_key *key);
  16 extern void debug_rt_mutex_lock(struct rt_mutex *lock);
  17 extern void debug_rt_mutex_unlock(struct rt_mutex *lock);
  18 extern void debug_rt_mutex_proxy_lock(struct rt_mutex *lock,
  19                                       struct task_struct *powner);
  20 extern void debug_rt_mutex_proxy_unlock(struct rt_mutex *lock);
  21 extern void debug_rt_mutex_deadlock(enum rtmutex_chainwalk chwalk,
  22                                     struct rt_mutex_waiter *waiter,
  23                                     struct rt_mutex *lock);
  24 extern void debug_rt_mutex_print_deadlock(struct rt_mutex_waiter *waiter);
  25 # define debug_rt_mutex_reset_waiter(w)                 \
  26         do { (w)->deadlock_lock = NULL; } while (0)
  27
  28 static inline bool debug_rt_mutex_detect_deadlock(struct rt_mutex_waiter *waiter,
  29                                                   enum rtmutex_chainwalk walk)
  30 {
  31         return (waiter != NULL);
  32 }
  33
  34 static inline void rt_mutex_print_deadlock(struct rt_mutex_waiter *w)
  35 {
  36         debug_rt_mutex_print_deadlock(w);
  37 }