/* * 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 task_struct *task);extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,				struct task_struct *task);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){	WRITE_ONCE(lock->owner, current);} static inline void mutex_clear_owner(struct mutex *lock){	WRITE_ONCE(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)