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 10 bounds-file := include/generated/bounds.h 11 12 targets := kernel/bounds.s 13 14 $(bounds-file): kernel/bounds.s FORCE 15 $(call filechk,offsets,__LINUX_BOUNDS_H__) 16 17 # Generate timeconst.h 18 19 timeconst-file := include/generated/timeconst.h 20 21 filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $< 22 23 $(timeconst-file): kernel/time/timeconst.bc FORCE 24 $(call filechk,gentimeconst) 25 26 # Generate asm-offsets.h 27 28 offsets-file := include/generated/asm-offsets.h 29 30 targets += arch/$(SRCARCH)/kernel/asm-offsets.s 31 32 arch/$(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 39 quiet_cmd_syscalls = CALL $< 40 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags) 41 42 PHONY += missing-syscalls 43 missing-syscalls: scripts/checksyscalls.sh $(offsets-file) 44 $(call cmd,syscalls) 45 46 # Check the manual modification of atomic headers 47 48 quiet_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 61 atomic-checks += $(addprefix $(obj)/.checked-, \ 62 atomic-arch-fallback.h \ 63 atomic-instrumented.h \ 64 atomic-long.h) 65 66 targets += $(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 72 PHONY += prepare 73 prepare: $(offsets-file) missing-syscalls $(atomic-checks) 74 @: 75 76 # Ordinary directory descending 77 # --------------------------------------------------------------------------- 78 79 obj-y += init/ 80 obj-y += usr/ 81 obj-y += arch/$(SRCARCH)/ 82 obj-y += $(ARCH_CORE) 83 obj-y += kernel/ 84 obj-y += certs/ 85 obj-y += mm/ 86 obj-y += fs/ 87 obj-y += ipc/ 88 obj-y += security/ 89 obj-y += crypto/ 90 obj-$(CONFIG_BLOCK) += block/ 91 obj-$(CONFIG_IO_URING) += io_uring/ 92 obj-$(CONFIG_RUST) += rust/ 93 obj-y += $(ARCH_LIB) 94 obj-y += drivers/ 95 obj-y += sound/ 96 obj-$(CONFIG_SAMPLES) += samples/ 97 obj-$(CONFIG_NET) += net/ 98 obj-y += virt/ 99 obj-y += $(ARCH_DRIVERS) 100