linux/kernel/mutex.h
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   1/*
   2 * Mutexes: blocking mutual exclusion locks
   3 *
   4 * started by Ingo Molnar:
   5 *
   6 *  Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
   7 *
   8 * This file contains mutex debugging related internal prototypes, for the
   9 * !CONFIG_DEBUG_MUTEXES case. Most of them are NOPs:
  10 */
  11
  12#define spin_lock_mutex(lock, flags) \
  13                do { spin_lock(lock); (void)(flags); } while (0)
  14#define spin_unlock_mutex(lock, flags) \
  15                do { spin_unlock(lock); (void)(flags); } while (0)
  16#define mutex_remove_waiter(lock, waiter, ti) \
  17                __list_del((waiter)->list.prev, (waiter)->list.next)
  18
  19#ifdef CONFIG_SMP
  20static inline void mutex_set_owner(struct mutex *lock)
  21{
  22        lock->owner = current;
  23}
  24
  25static inline void mutex_clear_owner(struct mutex *lock)
  26{
  27        lock->owner = NULL;
  28}
  29#else
  30static inline void mutex_set_owner(struct mutex *lock)
  31{
  32}
  33
  34static inline void mutex_clear_owner(struct mutex *lock)
  35{
  36}
  37#endif
  38
  39#define debug_mutex_wake_waiter(lock, waiter)           do { } while (0)
  40#define debug_mutex_free_waiter(waiter)                 do { } while (0)
  41#define debug_mutex_add_waiter(lock, waiter, ti)        do { } while (0)
  42#define debug_mutex_unlock(lock)                        do { } while (0)
  43#define debug_mutex_init(lock, name, key)               do { } while (0)
  44
  45static inline void
  46debug_mutex_lock_common(struct mutex *lock, struct mutex_waiter *waiter)
  47{
  48}
  49
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