1 # SPDX-License-Identifier: GPL-2.0
3 # Kbuild for top-level directory of the kernel
5 # Prepare global headers and check sanity before descending into sub-directories
6 # ---------------------------------------------------------------------------
10 bounds-file := include/generated/bounds.h
12 targets := kernel/bounds.s
14 $(bounds-file): kernel/bounds.s FORCE
15 $(call filechk,offsets,__LINUX_BOUNDS_H__)
17 # Generate timeconst.h
19 timeconst-file := include/generated/timeconst.h
21 filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $<
23 $(timeconst-file): kernel/time/timeconst.bc FORCE
24 $(call filechk,gentimeconst)
26 # Generate asm-offsets.h
28 offsets-file := include/generated/asm-offsets.h
30 targets += arch/$(SRCARCH)/kernel/asm-offsets.s
32 arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file)
34 $(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
35 $(call filechk,offsets,__ASM_OFFSETS_H__)
37 # Check for missing system calls
39 quiet_cmd_syscalls = CALL $<
40 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
42 PHONY += missing-syscalls
43 missing-syscalls: scripts/checksyscalls.sh $(offsets-file)
46 # Check atomic headers are up-to-date
48 quiet_cmd_atomics = CALL $<
49 cmd_atomics = $(CONFIG_SHELL) $<
52 old-atomics: scripts/atomic/check-atomics.sh
55 # A phony target that depends on all the preparation targets
58 prepare: $(offsets-file) missing-syscalls old-atomics