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authorLinus Torvalds <torvalds@g5.osdl.org>2006-01-09 20:31:38 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-09 20:31:38 -0500
commit80c0531514516e43ae118ddf38424e06e5c3cb3c (patch)
tree2eef8cf8fdf505b18f83078d1eb41167e98f5b54 /include/asm-generic/mutex-null.h
parenta457aa6c2bdd743bbbffd3f9e4fdbd8c71f8af1b (diff)
parent11b751ae8c8ca3fa24c85bd5a3e51dd9f95cda17 (diff)
Merge master.kernel.org:/pub/scm/linux/kernel/git/mingo/mutex-2.6
Diffstat (limited to 'include/asm-generic/mutex-null.h')
-rw-r--r--include/asm-generic/mutex-null.h24
1 files changed, 24 insertions, 0 deletions
diff --git a/include/asm-generic/mutex-null.h b/include/asm-generic/mutex-null.h
new file mode 100644
index 000000000000..5cf8b7ce0c45
--- /dev/null
+++ b/include/asm-generic/mutex-null.h
@@ -0,0 +1,24 @@
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