1 files changed, 48 insertions, 0 deletions

diff --git a/Kbuild b/Kbuild
new file mode 100644
index 000000000000..1880e6f760aa
--- /dev/null
+++ b/Kbuild
@@ -0,0 +1,48 @@
+#
+# Kbuild for top-level directory of the kernel
+# This file takes care of the following:
+# 1) Generate asm-offsets.h
+
+#####
+# 1) Generate asm-offsets.h 
+#
+
+offsets-file := include/asm-$(ARCH)/asm-offsets.h
+
+always  := $(offsets-file)
+targets := $(offsets-file)
+targets += arch/$(ARCH)/kernel/asm-offsets.s
+
+# Default sed regexp - multiline due to syntax constraints
+define sed-y
+        "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"
+endef
+# Override default regexp for specific architectures
+sed-$(CONFIG_MIPS) := "/^@@@/s///p"
+
+quiet_cmd_offsets = GEN     $@
+define cmd_offsets
+        cat $< | \
+        (set -e; \
+         echo "#ifndef __ASM_OFFSETS_H__"; \
+         echo "#define __ASM_OFFSETS_H__"; \
+         echo "/*"; \
+         echo " * DO NOT MODIFY."; \
+         echo " *"; \
+         echo " * This file was generated by $(srctree)/Kbuild"; \
+         echo " *"; \
+         echo " */"; \
+         echo ""; \
+         sed -ne $(sed-y); \
+         echo ""; \
+         echo "#endif" ) > $@
+endef
+
+# We use internal kbuild rules to avoid the "is up to date" message from make
+arch/$(ARCH)/kernel/asm-offsets.s: arch/$(ARCH)/kernel/asm-offsets.c FORCE
+        $(Q)mkdir -p $(dir $@)
+        $(call if_changed_dep,cc_s_c)
+
+$(srctree)/$(offsets-file): arch/$(ARCH)/kernel/asm-offsets.s Kbuild
+        $(call cmd,offsets)
+