include/asm-generic/mutex-null.h


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/*
 * 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