1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 # 2 #
3 # Kbuild for top-level directory of the kernel 3 # Kbuild for top-level directory of the kernel
4 4
5 # Prepare global headers and check sanity befo !! 5 #####
6 # -------------------------------------------- <<
7 <<
8 # Generate bounds.h 6 # Generate bounds.h
9 7
10 bounds-file := include/generated/bounds.h 8 bounds-file := include/generated/bounds.h
11 9
>> 10 always := $(bounds-file)
12 targets := kernel/bounds.s 11 targets := kernel/bounds.s
13 12
14 $(bounds-file): kernel/bounds.s FORCE 13 $(bounds-file): kernel/bounds.s FORCE
15 $(call filechk,offsets,__LINUX_BOUNDS_ 14 $(call filechk,offsets,__LINUX_BOUNDS_H__)
16 15
>> 16 #####
17 # Generate timeconst.h 17 # Generate timeconst.h
18 18
19 timeconst-file := include/generated/timeconst. 19 timeconst-file := include/generated/timeconst.h
20 20
>> 21 targets += $(timeconst-file)
>> 22
21 filechk_gentimeconst = echo $(CONFIG_HZ) | bc 23 filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $<
22 24
23 $(timeconst-file): kernel/time/timeconst.bc FO 25 $(timeconst-file): kernel/time/timeconst.bc FORCE
24 $(call filechk,gentimeconst) 26 $(call filechk,gentimeconst)
25 27
>> 28 #####
26 # Generate asm-offsets.h 29 # Generate asm-offsets.h
27 30
28 offsets-file := include/generated/asm-offsets. 31 offsets-file := include/generated/asm-offsets.h
29 32
>> 33 always += $(offsets-file)
30 targets += arch/$(SRCARCH)/kernel/asm-offsets. 34 targets += arch/$(SRCARCH)/kernel/asm-offsets.s
31 35
32 arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeco 36 arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file)
33 37
34 $(offsets-file): arch/$(SRCARCH)/kernel/asm-of 38 $(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
35 $(call filechk,offsets,__ASM_OFFSETS_H 39 $(call filechk,offsets,__ASM_OFFSETS_H__)
36 40
>> 41 #####
37 # Check for missing system calls 42 # Check for missing system calls
38 43
>> 44 always += missing-syscalls
>> 45 targets += missing-syscalls
>> 46
39 quiet_cmd_syscalls = CALL $< 47 quiet_cmd_syscalls = CALL $<
40 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) 48 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
41 49
42 PHONY += missing-syscalls !! 50 missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
43 missing-syscalls: scripts/checksyscalls.sh $(o <<
44 $(call cmd,syscalls) 51 $(call cmd,syscalls)
45 52
46 # Check the manual modification of atomic head !! 53 #####
>> 54 # Check atomic headers are up-to-date
>> 55
>> 56 always += old-atomics
>> 57 targets += old-atomics
>> 58
>> 59 quiet_cmd_atomics = CALL $<
>> 60 cmd_atomics = $(CONFIG_SHELL) $<
>> 61
>> 62 old-atomics: scripts/atomic/check-atomics.sh FORCE
>> 63 $(call cmd,atomics)
47 64
48 quiet_cmd_check_sha1 = CHKSHA1 $< !! 65 # Keep these three files during make clean
49 cmd_check_sha1 = \ !! 66 no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file)
50 if ! command -v sha1sum >/dev/null; th <<
51 echo "warning: cannot check th <<
52 exit 0; \ <<
53 fi; \ <<
54 if [ "$$(sed -n '$$s:// ::p' $<)" != \ <<
55 "$$(sed '$$d' $< | sha1sum | sed <<
56 echo "error: $< has been modif <<
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/l <<
68 $(call if_changed,check_sha1) <<
69 <<
70 # A phony target that depends on all the prepa <<
71 <<
72 PHONY += prepare <<
73 prepare: $(offsets-file) missing-syscalls $(at <<
74 @: <<
75 <<
76 # Ordinary directory descending <<
77 # -------------------------------------------- <<
78 <<
79 obj-y += init/ <<
80 obj-y += usr/ <<
81 obj-y += arch/$(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) <<
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