/* * asm-generic/mutex-null.h * * Generic implementation of the mutex fastpath, based on NOP :-) * * This is used by the mutex-debugging infrastructure, but it can also * be used by architectures that (for whatever reason) want to use the * spinlock based slowpath. */#ifndef _ASM_GENERIC_MUTEX_NULL_H#define _ASM_GENERIC_MUTEX_NULL_H /* extra parameter only needed for mutex debugging: */#ifndef __IP__# define __IP__#endif #define __mutex_fastpath_lock(count, fail_fn)	      fail_fn(count __RET_IP__)#define __mutex_fastpath_lock_retval(count, fail_fn)  fail_fn(count __RET_IP__)#define __mutex_fastpath_unlock(count, fail_fn)       fail_fn(count __RET_IP__)#define __mutex_fastpath_trylock(count, fail_fn)      fail_fn(count)#define __mutex_slowpath_needs_to_unlock()	      1 #endif