build_bug.h: remove negative-array fallback for BUILD_BUG_ON()

[linux-2.6-microblaze.git] / include / linux / build_bug.h

diff --git a/include/linux/build_bug.h b/include/linux/build_bug.h
index 43d1fd5..d415c64 100644 (file)
--- a/include/linux/build_bug.h
+++ b/include/linux/build_bug.h
@@ -51,23 +51,9 @@
  * If you have some code which relies on certain constants being equal, or
  * some other compile-time-evaluated condition, you should use BUILD_BUG_ON to
  * detect if someone changes it.
- *
- * The implementation uses gcc's reluctance to create a negative array, but gcc
- * (as of 4.4) only emits that error for obvious cases (e.g. not arguments to
- * inline functions).  Luckily, in 4.3 they added the "error" function
- * attribute just for this type of case.  Thus, we use a negative sized array
- * (should always create an error on gcc versions older than 4.4) and then call
- * an undefined function with the error attribute (should always create an
- * error on gcc 4.3 and later).  If for some reason, neither creates a
- * compile-time error, we'll still have a link-time error, which is harder to
- * track down.
  */
-#ifndef __OPTIMIZE__
-#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
-#else
 #define BUILD_BUG_ON(condition) \
        BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
-#endif
 
 /**
  * BUILD_BUG - break compile if used.