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