/* * 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 prototypes, for the * !CONFIG_DEBUG_MUTEXES case. Most of them are NOPs: */ #define spin_lock_mutex(lock, flags) \		do { spin_lock(lock); (void)(flags); } while (0)#define spin_unlock_mutex(lock, flags) \		do { spin_unlock(lock); (void)(flags); } while (0)#define mutex_remove_waiter(lock, waiter, task) \		__list_del((waiter)->list.prev, (waiter)->list.next) #ifdef CONFIG_MUTEX_SPIN_ON_OWNER/* * The mutex owner can get read and written to locklessly. * We should use WRITE_ONCE when writing the owner value to * avoid store tearing, otherwise, a thread could potentially * read a partially written and incomplete owner value. */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);}#elsestatic inline void mutex_set_owner(struct mutex *lock){} static inline void mutex_clear_owner(struct mutex *lock){}#endif #define debug_mutex_wake_waiter(lock, waiter)		do { } while (0)#define debug_mutex_free_waiter(waiter)			do { } while (0)#define debug_mutex_add_waiter(lock, waiter, ti)	do { } while (0)#define debug_mutex_unlock(lock)			do { } while (0)#define debug_mutex_init(lock, name, key)		do { } while (0) static inline voiddebug_mutex_lock_common(struct mutex *lock, struct mutex_waiter *waiter){}