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Tip revision: a909d3e636995ba7c349e2ca5dbb528154d4ac30 authored by Linus Torvalds on 29 October 2016, 20:52:02 UTC
Linux 4.9-rc3
Tip revision: a909d3e
mutex-null.h
/*
 * include/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

#define __mutex_fastpath_lock(count, fail_fn)		fail_fn(count)
#define __mutex_fastpath_lock_retval(count)		(-1)
#define __mutex_fastpath_unlock(count, fail_fn)		fail_fn(count)
#define __mutex_fastpath_trylock(count, fail_fn)	fail_fn(count)
#define __mutex_slowpath_needs_to_unlock()		1

#endif
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