diff options
Diffstat (limited to 'include/asm-generic/mutex-null.h')
| -rw-r--r-- | include/asm-generic/mutex-null.h | 24 |
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 @@ +/* + * 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 |