## Kbuild for top-level directory of the kernel# This file takes care of the following:# 1) Generate bounds.h# 2) Generate asm-offsets.h (may need bounds.h)# 3) Check for missing system calls ###### 1) Generate bounds.h bounds-file := include/linux/bounds.h always  := $(bounds-file)targets := $(bounds-file) kernel/bounds.s quiet_cmd_bounds = GEN     $@define cmd_bounds	(set -e; \	 echo "#ifndef __LINUX_BOUNDS_H__"; \	 echo "#define __LINUX_BOUNDS_H__"; \	 echo "/*"; \	 echo " * DO NOT MODIFY."; \	 echo " *"; \	 echo " * This file was generated by 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 makekernel/bounds.s: kernel/bounds.c FORCE	$(Q)mkdir -p $(dir $@)	$(call if_changed_dep,cc_s_c) $(obj)/$(bounds-file): kernel/bounds.s Kbuild	$(Q)mkdir -p $(dir $@)	$(call cmd,bounds) ###### 2) Generate asm-offsets.h# offsets-file := include/asm-$(SRCARCH)/asm-offsets.h always  += $(offsets-file)targets += $(offsets-file)targets += arch/$(SRCARCH)/kernel/asm-offsets.s  # Default sed regexp - multiline due to syntax constraintsdefine sed-y	"/^->/{s:->#\(.*\):/* \1 */:; \	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \	s:->::; p;}"endef 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 Kbuild"; \	 echo " *"; \	 echo " */"; \	 echo ""; \	 sed -ne $(sed-y) $<; \	 echo ""; \	 echo "#endif" ) > $@endef # We use internal kbuild rules to avoid the "is up to date" message from makearch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \                                      $(obj)/$(bounds-file) FORCE	$(Q)mkdir -p $(dir $@)	$(call if_changed_dep,cc_s_c) $(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild	$(Q)mkdir -p $(dir $@)	$(call cmd,offsets) ###### 3) Check for missing system calls# quiet_cmd_syscalls = CALL    $<      cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) PHONY += missing-syscallsmissing-syscalls: scripts/checksyscalls.sh FORCE	$(call cmd,syscalls) # Delete all targets during make cleanclean-files := $(addprefix $(objtree)/,$(filter-out $(bounds-file) $(offsets-file),$(targets)))