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 the manual modification of atomic headers 47 48quiet_cmd_check_sha1 = CHKSHA1 $< 49 cmd_check_sha1 = \ 50 if ! command -v sha1sum >/dev/null; then \ 51 echo "warning: cannot check the header due to sha1sum missing"; \ 52 exit 0; \ 53 fi; \ 54 if [ "$$(sed -n '$$s:// ::p' $<)" != \ 55 "$$(sed '$$d' $< | sha1sum | sed 's/ .*//')" ]; then \ 56 echo "error: $< has been modified." >&2; \ 57 exit 1; \ 58 fi; \ 59 touch $@ 60 61atomic-checks += $(addprefix $(obj)/.checked-, \ 62 atomic-arch-fallback.h \ 63 atomic-instrumented.h \ 64 atomic-long.h) 65 66targets += $(atomic-checks) 67$(atomic-checks): $(obj)/.checked-%: include/linux/atomic/% FORCE 68 $(call if_changed,check_sha1) 69 70# A phony target that depends on all the preparation targets 71 72PHONY += prepare 73prepare: $(offsets-file) missing-syscalls $(atomic-checks) 74 @: 75 76# Ordinary directory descending 77# --------------------------------------------------------------------------- 78 79obj-y += init/ 80obj-y += usr/ 81obj-y += arch/$(SRCARCH)/ 82obj-y += $(ARCH_CORE) 83obj-y += kernel/ 84obj-y += certs/ 85obj-y += mm/ 86obj-y += fs/ 87obj-y += ipc/ 88obj-y += security/ 89obj-y += crypto/ 90obj-$(CONFIG_BLOCK) += block/ 91obj-$(CONFIG_IO_URING) += io_uring/ 92obj-$(CONFIG_RUST) += rust/ 93obj-y += $(ARCH_LIB) 94obj-y += drivers/ 95obj-y += sound/ 96obj-$(CONFIG_SAMPLES) += samples/ 97obj-$(CONFIG_NET) += net/ 98obj-y += virt/ 99obj-y += $(ARCH_DRIVERS) 100