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C/C++ Source or Header  |  2008-12-24  |  666 b   |  20 lines
  1. /*
  2.  * include/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. #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
  18.  
  19. #endif
  20.