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
  17debug_mutex_set_owner(struct mutex *lock, struct thread_info *new_owner);
  18
  19static inline void debug_mutex_clear_owner(struct mutex *lock)
  20{
  21        lock->owner = NULL;
  22}
  23
  24extern void debug_mutex_lock_common(struct mutex *lock,
  25                                    struct mutex_waiter *waiter);
  26extern void debug_mutex_wake_waiter(struct mutex *lock,
  27                                    struct mutex_waiter *waiter);
  28extern void debug_mutex_free_waiter(struct mutex_waiter *waiter);
  29extern void debug_mutex_add_waiter(struct mutex *lock,
  30                                   struct mutex_waiter *waiter,
  31                                   struct thread_info *ti);
  32extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
  33                                struct thread_info *ti);
  34extern void debug_mutex_unlock(struct mutex *lock);
  35extern 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)
  54