[deliverable/linux.git] / include / asm-generic / mutex-null.h

/*
 * 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
Commit	Line	Data
620a6fd1 IM	1	/*
	2	* asm-generic/mutex-null.h
	3	*
	4	* Generic implementation of the mutex fastpath, based on NOP :-)
	5	*
	6	* This is used by the mutex-debugging infrastructure, but it can also
	7	* be used by architectures that (for whatever reason) want to use the
	8	* spinlock based slowpath.
	9	*/
	10	#ifndef _ASM_GENERIC_MUTEX_NULL_H
	11	#define _ASM_GENERIC_MUTEX_NULL_H
	12
	13	/* extra parameter only needed for mutex debugging: */
	14	#ifndef __IP__
	15	# define __IP__
	16	#endif
	17
	18	#define __mutex_fastpath_lock(count, fail_fn) fail_fn(count __RET_IP__)
	19	#define __mutex_fastpath_lock_retval(count, fail_fn) fail_fn(count __RET_IP__)
	20	#define __mutex_fastpath_unlock(count, fail_fn) fail_fn(count __RET_IP__)
	21	#define __mutex_fastpath_trylock(count, fail_fn) fail_fn(count)
	22	#define __mutex_slowpath_needs_to_unlock() 1
	23
	24	#endif