#define BUILD_BUG_ON_ZERO(e) (0)
#define BUILD_BUG_ON_NULL(e) ((void*)0)
#define BUILD_BUG_ON_INVALID(e) (0)
+#define BUILD_BUG_ON_MSG(cond, msg) (0)
#define BUILD_BUG_ON(condition) (0)
#define BUILD_BUG() (0)
#else /* __CHECKER__ */
*/
#define BUILD_BUG_ON_INVALID(e) ((void)(sizeof((__force long)(e))))
+/**
+ * BUILD_BUG_ON_MSG - break compile if a condition is true & emit supplied
+ * error message.
+ * @condition: the condition which the compiler should know is false.
+ *
+ * See BUILD_BUG_ON for description.
+ */
+#define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
+
/**
* BUILD_BUG_ON - break compile if a condition is true.
* @condition: the condition which the compiler should know is false.
#ifndef __OPTIMIZE__
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
#else
-#define BUILD_BUG_ON(condition) \
- do { \
- bool __cond = !!(condition); \
- extern void __build_bug_on_failed(void) \
- __compiletime_error("BUILD_BUG_ON failed"); \
- if (__cond) \
- __build_bug_on_failed(); \
- ((void)sizeof(char[1 - 2 * __cond])); \
- } while (0)
+#define BUILD_BUG_ON(condition) \
+ BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
#endif
/**
* build time, you should use BUILD_BUG to detect if it is
* unexpectedly used.
*/
-#define BUILD_BUG() \
- do { \
- extern void __build_bug_failed(void) \
- __compiletime_error("BUILD_BUG failed");\
- __build_bug_failed(); \
- } while (0)
+#define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
#endif /* __CHECKER__ */