LXR linux/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 */
  16extern void debug_mutex_lock_common(struct mutex *lock,
  17                                    struct mutex_waiter *waiter);
  18extern void debug_mutex_wake_waiter(struct mutex *lock,
  19                                    struct mutex_waiter *waiter);
  20extern void debug_mutex_free_waiter(struct mutex_waiter *waiter);
  21extern void debug_mutex_add_waiter(struct mutex *lock,
  22                                   struct mutex_waiter *waiter,
  23                                   struct thread_info *ti);
  24extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
  25                                struct thread_info *ti);
  26extern void debug_mutex_unlock(struct mutex *lock);
  27extern void debug_mutex_init(struct mutex *lock, const char *name,
  28                             struct lock_class_key *key);
  29
  30static inline void mutex_set_owner(struct mutex *lock)
  31{
  32        lock->owner = current;
  33}
  34
  35static inline void mutex_clear_owner(struct mutex *lock)
  36{
  37        lock->owner = NULL;
  38}
  39
  40#define spin_lock_mutex(lock, flags)                    \
  41        do {                                            \
  42                struct mutex *l = container_of(lock, struct mutex, wait_lock); \
  43                                                        \
  44                DEBUG_LOCKS_WARN_ON(in_interrupt());    \
  45                local_irq_save(flags);                  \
  46                arch_spin_lock(&(lock)->rlock.raw_lock);\
  47                DEBUG_LOCKS_WARN_ON(l->magic != l);     \
  48        } while (0)
  49
  50#define spin_unlock_mutex(lock, flags)                          \
  51        do {                                                    \
  52                arch_spin_unlock(&(lock)->rlock.raw_lock);      \
  53                local_irq_restore(flags);                       \
  54                preempt_check_resched();                        \
  55        } while (0)
  56