Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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# Generate rq-offsets.h
38
39rq-offsets-file := include/generated/rq-offsets.h
40
41targets += kernel/sched/rq-offsets.s
42
43kernel/sched/rq-offsets.s: $(offsets-file)
44
45$(rq-offsets-file): kernel/sched/rq-offsets.s FORCE
46 $(call filechk,offsets,__RQ_OFFSETS_H__)
47
48# Check for missing system calls
49
50quiet_cmd_syscalls = CALL $<
51 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
52
53PHONY += missing-syscalls
54missing-syscalls: scripts/checksyscalls.sh $(rq-offsets-file)
55 $(call cmd,syscalls)
56
57# Check the manual modification of atomic headers
58
59quiet_cmd_check_sha1 = CHKSHA1 $<
60 cmd_check_sha1 = \
61 if ! command -v sha1sum >/dev/null; then \
62 echo "warning: cannot check the header due to sha1sum missing"; \
63 exit 0; \
64 fi; \
65 if [ "$$(sed -n '$$s:// ::p' $<)" != \
66 "$$(sed '$$d' $< | sha1sum | sed 's/ .*//')" ]; then \
67 echo "error: $< has been modified." >&2; \
68 exit 1; \
69 fi; \
70 touch $@
71
72atomic-checks += $(addprefix $(obj)/.checked-, \
73 atomic-arch-fallback.h \
74 atomic-instrumented.h \
75 atomic-long.h)
76
77targets += $(atomic-checks)
78$(atomic-checks): $(obj)/.checked-%: include/linux/atomic/% FORCE
79 $(call if_changed,check_sha1)
80
81# A phony target that depends on all the preparation targets
82
83PHONY += prepare
84prepare: $(offsets-file) missing-syscalls $(atomic-checks)
85 @:
86
87# Ordinary directory descending
88# ---------------------------------------------------------------------------
89
90obj-y += init/
91obj-y += usr/
92obj-y += arch/$(SRCARCH)/
93obj-y += $(ARCH_CORE)
94obj-y += kernel/
95obj-y += certs/
96obj-y += mm/
97obj-y += fs/
98obj-y += ipc/
99obj-y += security/
100obj-y += crypto/
101obj-$(CONFIG_BLOCK) += block/
102obj-$(CONFIG_IO_URING) += io_uring/
103obj-$(CONFIG_RUST) += rust/
104obj-y += $(ARCH_LIB)
105obj-y += drivers/
106obj-y += sound/
107obj-$(CONFIG_SAMPLES) += samples/
108obj-$(CONFIG_NET) += net/
109obj-y += virt/
110obj-y += $(ARCH_DRIVERS)
111obj-$(CONFIG_DRM_HEADER_TEST) += include/