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_thread_info(); 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