kernel/mutex-debug.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 declarations,
   9  * prototypes and inline functions, for the CONFIG_DEBUG_MUTEXES case.
  10  * More details are in kernel/mutex-debug.c.
  11  */
  12
  13 /*
  14  * This must be called with lock->wait_lock held.
  15  */
  16 extern void
  17 debug_mutex_set_owner(struct mutex *lock, struct thread_info *new_owner);
  18
  19 static inline void debug_mutex_clear_owner(struct mutex *lock)
  20 {
  21         lock->owner = NULL;
  22 }
  23
  24 extern void debug_mutex_lock_common(struct mutex *lock,
  25                                     struct mutex_waiter *waiter);
  26 extern void debug_mutex_wake_waiter(struct mutex *lock,
  27                                     struct mutex_waiter *waiter);
  28 extern void debug_mutex_free_waiter(struct mutex_waiter *waiter);
  29 extern void debug_mutex_add_waiter(struct mutex *lock,
  30                                    struct mutex_waiter *waiter,
  31                                    struct thread_info *ti);
  32 extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
  33                                 struct thread_info *ti);
  34 extern void debug_mutex_unlock(struct mutex *lock);
  35 extern void debug_mutex_init(struct mutex *lock, const char *name,
  36                              struct lock_class_key *key);
  37
  38 #define spin_lock_mutex(lock, flags)                    \
  39         do {                                            \
  40                 struct mutex *l = container_of(lock, struct mutex, wait_lock); \
  41                                                         \
  42                 DEBUG_LOCKS_WARN_ON(in_interrupt());    \
  43                 local_irq_save(flags);                  \
  44                 __raw_spin_lock(&(lock)->raw_lock);     \
  45                 DEBUG_LOCKS_WARN_ON(l->magic != l);     \
  46         } while (0)
  47
  48 #define spin_unlock_mutex(lock, flags)                  \
  49         do {                                            \
  50                 __raw_spin_unlock(&(lock)->raw_lock);   \
  51                 local_irq_restore(flags);               \
  52                 preempt_check_resched();                \
  53         } while (0)