1# SPDX-License-Identifier: GPL-2.0 2# 3# Kbuild for top-level directory of the kernel 4 5# Prepare global headers and check sanity before descending into sub-directories 6# --------------------------------------------------------------------------- 7 8# Generate bounds.h 9 10bounds-file := include/generated/bounds.h 11 12targets := kernel/bounds.s 13 14$(bounds-file): kernel/bounds.s FORCE 15 $(call filechk,offsets,__LINUX_BOUNDS_H__) 16 17# Generate timeconst.h 18 19timeconst-file := include/generated/timeconst.h 20 21filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $< 22 23$(timeconst-file): kernel/time/timeconst.bc FORCE 24 $(call filechk,gentimeconst) 25 26# Generate asm-offsets.h 27 28offsets-file := include/generated/asm-offsets.h 29 30targets += arch/$(SRCARCH)/kernel/asm-offsets.s 31 32arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file) 33 34$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE 35 $(call filechk,offsets,__ASM_OFFSETS_H__) 36 37# Check for missing system calls 38 39quiet_cmd_syscalls = CALL $< 40 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) 41 42PHONY += missing-syscalls 43missing-syscalls: scripts/checksyscalls.sh $(offsets-file) 44 $(call cmd,syscalls) 45 46# Check atomic headers are up-to-date 47 48quiet_cmd_atomics = CALL $< 49 cmd_atomics = $(CONFIG_SHELL) $< 50 51PHONY += old-atomics 52old-atomics: scripts/atomic/check-atomics.sh 53 $(call cmd,atomics) 54 55# A phony target that depends on all the preparation targets 56 57PHONY += prepare 58prepare: $(offsets-file) missing-syscalls old-atomics 59 @: 60