root/kernel/mutex-debug.h

INCLUDED FROM

DEFINITIONS

1. debug_mutex_clear_owner

/*
 * Mutexes: blocking mutual exclusion locks
 *
 * started by Ingo Molnar:
 *
 *  Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
 *
 * This file contains mutex debugging related internal declarations,
 * prototypes and inline functions, for the CONFIG_DEBUG_MUTEXES case.
 * More details are in kernel/mutex-debug.c.
 */

/*
 * This must be called with lock->wait_lock held.
 */
extern void
debug_mutex_set_owner(struct mutex *lock, struct thread_info *new_owner);

static inline void debug_mutex_clear_owner(struct mutex *lock)
{
        lock->owner = NULL;
}

extern void debug_mutex_lock_common(struct mutex *lock,
                                    struct mutex_waiter *waiter);
extern void debug_mutex_wake_waiter(struct mutex *lock,
                                    struct mutex_waiter *waiter);
extern void debug_mutex_free_waiter(struct mutex_waiter *waiter);
extern void debug_mutex_add_waiter(struct mutex *lock,
                                   struct mutex_waiter *waiter,
                                   struct thread_info *ti);
extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
                                struct thread_info *ti);
extern void debug_mutex_unlock(struct mutex *lock);
extern void debug_mutex_init(struct mutex *lock, const char *name,
                             struct lock_class_key *key);

#define spin_lock_mutex(lock, flags)                    \
        do {                                            \
                struct mutex *l = container_of(lock, struct mutex, wait_lock); \
                                                        \
                DEBUG_LOCKS_WARN_ON(in_interrupt());    \
                local_irq_save(flags);                  \
                __raw_spin_lock(&(lock)->raw_lock);     \
                DEBUG_LOCKS_WARN_ON(l->magic != l);     \
        } while (0)

#define spin_unlock_mutex(lock, flags)                  \
        do {                                            \
                __raw_spin_unlock(&(lock)->raw_lock);   \
                local_irq_restore(flags);               \
                preempt_check_resched();                \
        } while (0)