[PATCH 1/3] linux/bug.h: move BUILD_BUG_ON*() macros

[Masahiro Yamada]

In Linux, the macros BUILD_BUG_ON* are defined in include/linux/bug.h.
To tidy up common.h, move BUILD_BUG_* there.

MAYBE_BUILD_BUG_ON is not used in barebox and it was removed from Linux
long time ago.  Drop it from barebox, too.

Signed-off-by: Masahiro Yamada <yamada.m at jp.panasonic.com>
---

 include/common.h    | 20 +-------------------
 include/linux/bug.h | 28 ++++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 19 deletions(-)
 create mode 100644 include/linux/bug.h

diff --git a/include/common.h b/include/common.h
index f3f5c0f..c30f6bd 100644
--- a/include/common.h
+++ b/include/common.h
@@ -27,6 +27,7 @@
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/kernel.h>
+#include <linux/bug.h>
 #include <linux/stddef.h>
 #include <asm/common.h>
 #include <printk.h>
@@ -175,25 +176,6 @@ static inline char *shell_expand(char *str)
 }
 #endif
 
-/* Force a compilation error if condition is true */
-#define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_ZERO(condition))
-
-/* Force a compilation error if condition is constant and true */
-#define MAYBE_BUILD_BUG_ON(cond) ((void)sizeof(char[1 - 2 * !!(cond)]))
-
-/* Force a compilation error if a constant expression is not a power of 2 */
-#define BUILD_BUG_ON_NOT_POWER_OF_2(n)			\
-	BUILD_BUG_ON((n) == 0 || (((n) & ((n) - 1)) != 0))
-
-/*
- * Force a compilation error if condition is true, but also produce a
- * result (of value 0 and type size_t), so the expression can be used
- * e.g. in a structure initializer (or where-ever else comma
- * expressions aren't permitted).
- */
-#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
-#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
-
 #define ALIGN(x, a)		__ALIGN_MASK(x, (typeof(x))(a) - 1)
 #define __ALIGN_MASK(x, mask)	(((x) + (mask)) & ~(mask))
 #define ALIGN_DOWN(x, a)	((x) & ~((typeof(x))(a) - 1))
diff --git a/include/linux/bug.h b/include/linux/bug.h
new file mode 100644
index 0000000..3449837
--- /dev/null
+++ b/include/linux/bug.h
@@ -0,0 +1,28 @@
+#ifndef _LINUX_BUG_H
+#define _LINUX_BUG_H
+
+#ifdef __CHECKER__
+#define BUILD_BUG_ON_NOT_POWER_OF_2(n) (0)
+#define BUILD_BUG_ON_ZERO(e) (0)
+#define BUILD_BUG_ON_NULL(e) ((void*)0)
+#define BUILD_BUG_ON(condition) (0)
+#else /* __CHECKER__ */
+
+/* Force a compilation error if a constant expression is not a power of 2 */
+#define BUILD_BUG_ON_NOT_POWER_OF_2(n)			\
+	BUILD_BUG_ON((n) == 0 || (((n) & ((n) - 1)) != 0))
+
+/* Force a compilation error if condition is true, but also produce a
+   result (of value 0 and type size_t), so the expression can be used
+   e.g. in a structure initializer (or where-ever else comma expressions
+   aren't permitted). */
+#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
+#define BUILD_BUG_ON_NULL(e) ((void *)sizeof(struct { int:-!!(e); }))
+
+/* Force a compilation error if condition is true */
+#define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_ZERO(condition))
+
+#endif
+
+
+#endif	/* _LINUX_BUG_H */
-- 
1.9.1