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i2c: Legacy i2c drivers shouldn't issue uevents
[mirror_ubuntu-bionic-kernel.git] / Kbuild
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1#
2# Kbuild for top-level directory of the kernel
3# This file takes care of the following:
4# 1) Generate asm-offsets.h
c53aeca0 5# 2) Check for missing system calls
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6
7#####
8d36a623 8# 1) Generate asm-offsets.h
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9#
10
11offsets-file := include/asm-$(ARCH)/asm-offsets.h
12
13always := $(offsets-file)
14targets := $(offsets-file)
15targets += arch/$(ARCH)/kernel/asm-offsets.s
16
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17# Default sed regexp - multiline due to syntax constraints
18define sed-y
19 "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"
20endef
21# Override default regexp for specific architectures
0947640f 22sed-$(CONFIG_MIPS) := "/^@@@/{s/^@@@//; s/ \#.*\$$//; p;}"
048eb582 23
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24quiet_cmd_offsets = GEN $@
25define cmd_offsets
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26 (set -e; \
27 echo "#ifndef __ASM_OFFSETS_H__"; \
28 echo "#define __ASM_OFFSETS_H__"; \
29 echo "/*"; \
30 echo " * DO NOT MODIFY."; \
31 echo " *"; \
65ff22ee 32 echo " * This file was generated by Kbuild"; \
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33 echo " *"; \
34 echo " */"; \
35 echo ""; \
ac448afb 36 sed -ne $(sed-y) $<; \
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37 echo ""; \
38 echo "#endif" ) > $@
39endef
40
41# We use internal kbuild rules to avoid the "is up to date" message from make
42arch/$(ARCH)/kernel/asm-offsets.s: arch/$(ARCH)/kernel/asm-offsets.c FORCE
43 $(Q)mkdir -p $(dir $@)
44 $(call if_changed_dep,cc_s_c)
45
8d36a623 46$(obj)/$(offsets-file): arch/$(ARCH)/kernel/asm-offsets.s Kbuild
ac448afb 47 $(Q)mkdir -p $(dir $@)
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48 $(call cmd,offsets)
49
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50#####
51# 2) Check for missing system calls
52#
53
54quiet_cmd_syscalls = CALL $<
55 cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags)
56
57PHONY += missing-syscalls
58missing-syscalls: scripts/checksyscalls.sh FORCE
59 $(call cmd,syscalls)