--- /dev/null
+#
+# 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/arch-$(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-$(CONFIG_MIPS) := "/^@@@/{s/^@@@//; s/ \#.*\$$//; p;}"
+
+quiet_cmd_offsets = GEN $@
+define cmd_offsets
+ (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 $@)
+ $(call if_changed_dep,cc_s_c)
+
+$(obj)/$(offsets-file): arch/$(ARCH)/kernel/asm-offsets.s Kbuild
+ $(Q)mkdir -p $(dir $@)
+ $(call cmd,offsets)
+
