kernel/locking/mutex.h

   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_MUTEX_SPIN_ON_OWNER
  20 static inline void mutex_set_owner(struct mutex *lock)
  21 {
  22         lock->owner = current;
  23 }
  24
  25 static inline void mutex_clear_owner(struct mutex *lock)
  26 {
  27         lock->owner = NULL;
  28 }
  29 #else
  30 static inline void mutex_set_owner(struct mutex *lock)
  31 {
  32 }
  33
  34 static 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
  45 static inline void
  46 debug_mutex_lock_common(struct mutex *lock, struct mutex_waiter *waiter)
  47 {
  48 }