ia64/linux-2.6.18-xen.hg

view include/asm-generic/mutex-null.h @ 782:9ab1c319531f

merge with linux-2.6.18-xen.hg
author Isaku Yamahata <yamahata@valinux.co.jp>
date Wed Jan 28 13:07:23 2009 +0900 (2009-01-28)
parents 831230e53067
children
line source
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
13 #define __mutex_fastpath_lock(count, fail_fn) fail_fn(count)
14 #define __mutex_fastpath_lock_retval(count, fail_fn) fail_fn(count)
15 #define __mutex_fastpath_unlock(count, fail_fn) fail_fn(count)
16 #define __mutex_fastpath_trylock(count, fail_fn) fail_fn(count)
17 #define __mutex_slowpath_needs_to_unlock() 1
19 #endif