kbuild: move asm-offsets.h rule to ./Kbuild

Currently, MIPS is the only architecture that needs
include/generated/asm-offsets.h, but we have got ./Kbuild file now.

It is a good reason to move asm-offsets.h rule from arch/mips/Makefile
to ./Kbuild and add dummy asm-offsets.c for the other architectures.
asm-offsets.h would be useful for all the architectures.

This commit does not implement include/generated/bounds.h,
but if necessary, it is easy to implement it.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 18 insertions, 0 deletions

diff --git a/arch/openrisc/lib/asm-offsets.c b/arch/openrisc/lib/asm-offsets.c
new file mode 100644
index 0000000000..8cee8e00c6
--- /dev/null
+++ b/arch/openrisc/lib/asm-offsets.c
@@ -0,0 +1,18 @@
+/*
+ * OpenRISC asm-offsets.c
+ *
+ * This program is used to generate definitions needed by
+ * assembly language modules.
+ *
+ * We use the technique used in the OSF Mach kernel code:
+ * generate asm statements containing #defines,
+ * compile this file to assembler, and then extract the
+ * #defines from the assembly-language output.
+ */
+
+#include <linux/kbuild.h>
+
+int main(void)
+{
+	return 0;
+}