# SPDX-License-Identifier: GPL-2.0 # # Kbuild for top-level directory of the kernel # Prepare global headers and check sanity before descending into sub-directories # --------------------------------------------------------------------------- # Generate bounds.h bounds-file := include/generated/bounds.h targets := kernel/bounds.s $(bounds-file): kernel/bounds.s FORCE $(call filechk,offsets,__LINUX_BOUNDS_H__) # Generate timeconst.h timeconst-file := include/generated/timeconst.h filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $< $(timeconst-file): kernel/time/timeconst.bc FORCE $(call filechk,gentimeconst) # Generate asm-offsets.h offsets-file := include/generated/asm-offsets.h targets += arch/$(SRCARCH)/kernel/asm-offsets.s arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file) $(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE $(call filechk,offsets,__ASM_OFFSETS_H__) # Check for missing system calls quiet_cmd_syscalls = CALL $< cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) PHONY += missing-syscalls missing-syscalls: scripts/checksyscalls.sh $(offsets-file) $(call cmd,syscalls) # Check the manual modification of atomic headers quiet_cmd_check_sha1 = CHKSHA1 $< cmd_check_sha1 = \ if ! command -v sha1sum >/dev/null; then \ echo "warning: cannot check the header due to sha1sum missing"; \ exit 0; \ fi; \ if [ "$$(sed -n '$$s:// ::p' $<)" != \ "$$(sed '$$d' $< | sha1sum | sed 's/ .*//')" ]; then \ echo "error: $< has been modified." >&2; \ exit 1; \ fi; \ touch $@ atomic-checks += $(addprefix $(obj)/.checked-, \ atomic-arch-fallback.h \ atomic-instrumented.h \ atomic-long.h) targets += $(atomic-checks) $(atomic-checks): $(obj)/.checked-%: include/linux/atomic/% FORCE $(call if_changed,check_sha1) # A phony target that depends on all the preparation targets PHONY += prepare prepare: $(offsets-file) missing-syscalls $(atomic-checks) @: # Ordinary directory descending # --------------------------------------------------------------------------- obj-y += init/ obj-y += usr/ obj-y += arch/$(SRCARCH)/ obj-y += $(ARCH_CORE) obj-y += kernel/ obj-y += certs/ obj-y += mm/ obj-y += fs/ obj-y += ipc/ obj-y += security/ obj-y += crypto/ obj-$(CONFIG_BLOCK) += block/ obj-$(CONFIG_IO_URING) += io_uring/ obj-$(CONFIG_RUST) += rust/ obj-y += $(ARCH_LIB) obj-y += drivers/ obj-y += sound/ obj-$(CONFIG_SAMPLES) += samples/ obj-$(CONFIG_NET) += net/ obj-y += virt/ obj-y += $(ARCH_DRIVERS)