/* * 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_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); static inline void mutex_set_owner(struct mutex *lock) { lock->owner = current_thread_info(); } static inline void mutex_clear_owner(struct mutex *lock) { lock->owner = NULL; } #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); \ arch_spin_lock(&(lock)->rlock.raw_lock);\ DEBUG_LOCKS_WARN_ON(l->magic != l); \ } while (0) #define spin_unlock_mutex(lock, flags) \ do { \ arch_spin_unlock(&(lock)->rlock.raw_lock); \ local_irq_restore(flags); \ preempt_check_resched(); \ } while (0)