kernel/rtmutex-debug.h

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