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C/C++ Source or Header  |  2006-08-11  |  806 b   |  25 lines
  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
  25.