Kbuild updates for v4.20
- optimize kallsyms slightly - remove check for old CFLAGS usage - add some compiler flags unconditionally instead of evaluating $(call cc-option,...) - fix variable shadowing in host tools - refactor scripts/mkmakefile - refactor various makefiles -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJb1eyEAAoJED2LAQed4NsGUjwP/0/W0nLP+nKCJ0NpsSD151Ea Vrbm+RMxl8uPuQ0+Bh59rdO2yWR8v7jOX8CPbX1DqW0XwW4vTNRZm9j6A83rJzHv dPpinUObq6vXGJCYvMLoumhOkM1lRZie1AeBeLgKF0G0jprxUspGvakSyM/5SOo6 3gIhpPcczijC980KHIJbmwiGqRFVs3/zwqcKjQaRD3C6f4HdJL3i9Zr7kuZF0g1x dxCdN4Shv5x0igggp58z8646bbKlN7hItYaPq2csDop55/jWKzUkBkFkeaDjiUdB B6ysQfwkuTb6sbKXE6euYLUTyc6epx9v9pey0FpOx5tjXT+QmgK1ddLQEwdFH2+/ Fd5VR70h8uKTNvmqFJ+iebpR/aC71sUqYAzsoiTVZibR/F6+QAuhHJPZJDlSSwLC QH7j0fwJ3X5p9PYe3JBWyWzOd9BDvtV+HGE67Kx17iRNW0FDyKSvn7tezRVtqvHr KENrMT4n+lNQzB+c4lfjOE9ANpOf+PP4+ODhbrtvKItyb5QfF4F+5CDVif3wv3Kt 6dvh13hvR06gQCpbuxcFgD17mT1T/lVieuzOnWjtEh4HiMI1H0abYfkRWbQshrti u7TfYxwAyWKtisiPiT/1THYsW3ux7QmTSIo2iOznQxDlbmzENpQx+f22HsLaC0XU AUgvKGBaN0WOar2f2gyq =jM4E -----END PGP SIGNATURE----- Merge tag 'kbuild-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - optimize kallsyms slightly - remove check for old CFLAGS usage - add some compiler flags unconditionally instead of evaluating $(call cc-option,...) - fix variable shadowing in host tools - refactor scripts/mkmakefile - refactor various makefiles * tag 'kbuild-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: modpost: Create macro to avoid variable shadowing ASN.1: Remove unnecessary shadowed local variable kbuild: use 'else ifeq' for checksrc to improve readability kbuild: remove unneeded link_multi_deps kbuild: add -Wno-unused-but-set-variable flag unconditionally kbuild: add -Wdeclaration-after-statement flag unconditionally kbuild: add -Wno-pointer-sign flag unconditionally modpost: remove leftover symbol prefix handling for module device table kbuild: simplify command line creation in scripts/mkmakefile kbuild: do not pass $(objtree) to scripts/mkmakefile kbuild: remove user ID check in scripts/mkmakefile kbuild: remove VERSION and PATCHLEVEL from $(objtree)/Makefile kbuild: add --include-dir flag only for out-of-tree build kbuild: remove dead code in cmd_files calculation in top Makefile kbuild: hide most of targets when running config or mixed targets kbuild: remove old check for CFLAGS use kbuild: prefix Makefile.dtbinst path with $(srctree) unconditionally kallsyms: remove left-over Blackfin code kallsyms: reduce size a little on 64-bit
This commit is contained in:
Linus Torvalds
commit
ac747c0715
31
Makefile
31
Makefile
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@ -15,10 +15,9 @@ NAME = "People's Front"
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PHONY := _all
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_all:
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# o Do not use make's built-in rules and variables
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# (this increases performance and avoids hard-to-debug behaviour);
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# o Look for make include files relative to root of kernel src
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MAKEFLAGS += -rR --include-dir=$(CURDIR)
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# Do not use make's built-in rules and variables
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# (this increases performance and avoids hard-to-debug behaviour)
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MAKEFLAGS += -rR
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# Avoid funny character set dependencies
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unexport LC_ALL
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@ -136,6 +135,13 @@ KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
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$(if $(KBUILD_OUTPUT),, \
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$(error failed to create output directory "$(saved-output)"))
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# Look for make include files relative to root of kernel src
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#
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# This does not become effective immediately because MAKEFLAGS is re-parsed
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# once after the Makefile is read. It is OK since we are going to invoke
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# 'sub-make' below.
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MAKEFLAGS += --include-dir=$(CURDIR)
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PHONY += $(MAKECMDGOALS) sub-make
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$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
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@ -476,8 +482,7 @@ PHONY += outputmakefile
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outputmakefile:
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ifneq ($(KBUILD_SRC),)
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$(Q)ln -fsn $(srctree) source
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$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
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$(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
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$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
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endif
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ifeq ($(cc-name),clang)
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@ -713,7 +718,7 @@ else
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# These warnings generated too much noise in a regular build.
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# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
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KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
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KBUILD_CFLAGS += -Wno-unused-but-set-variable
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endif
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KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
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@ -794,10 +799,10 @@ endif
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NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
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# warn about C99 declaration after statement
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KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
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KBUILD_CFLAGS += -Wdeclaration-after-statement
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# disable pointer signed / unsigned warnings in gcc 4.0
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KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
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KBUILD_CFLAGS += -Wno-pointer-sign
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# disable stringop warnings in gcc 8+
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KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
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@ -1647,9 +1652,6 @@ namespacecheck:
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export_report:
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$(PERL) $(srctree)/scripts/export_report.pl
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endif #ifeq ($(config-targets),1)
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endif #ifeq ($(mixed-targets),1)
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PHONY += checkstack kernelrelease kernelversion image_name
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# UML needs a little special treatment here. It wants to use the host
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@ -1756,14 +1758,15 @@ cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
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$(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
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# read all saved command lines
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cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
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cmd_files := $(wildcard .*.cmd)
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ifneq ($(cmd_files),)
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$(cmd_files): ; # Do not try to update included dependency files
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include $(cmd_files)
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endif
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endif # ifeq ($(config-targets),1)
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endif # ifeq ($(mixed-targets),1)
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endif # skip-makefile
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PHONY += FORCE
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@ -37,7 +37,7 @@ extern const u8 kallsyms_names[] __weak;
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* Tell the compiler that the count isn't in the small data section if the arch
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* has one (eg: FRV).
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*/
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extern const unsigned long kallsyms_num_syms
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extern const unsigned int kallsyms_num_syms
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__attribute__((weak, section(".rodata")));
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extern const unsigned long kallsyms_relative_base
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@ -46,7 +46,7 @@ __attribute__((weak, section(".rodata")));
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extern const u8 kallsyms_token_table[] __weak;
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extern const u16 kallsyms_token_index[] __weak;
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extern const unsigned long kallsyms_markers[] __weak;
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extern const unsigned int kallsyms_markers[] __weak;
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/*
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* Expand a compressed symbol data into the resulting uncompressed string,
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@ -195,7 +195,7 @@ modbuiltin := -f $(srctree)/scripts/Makefile.modbuiltin obj
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# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.dtbinst obj=
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# Usage:
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# $(Q)$(MAKE) $(dtbinst)=dir
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dtbinst := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.dtbinst obj
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dtbinst := -f $(srctree)/scripts/Makefile.dtbinst obj
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###
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# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=
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@ -36,21 +36,11 @@ subdir-ccflags-y :=
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include scripts/Kbuild.include
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# For backward compatibility check that these variables do not change
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save-cflags := $(CFLAGS)
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# The filename Kbuild has precedence over Makefile
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kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
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kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
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include $(kbuild-file)
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# If the save-* variables changed error out
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ifeq ($(KBUILD_NOPEDANTIC),)
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ifneq ("$(save-cflags)","$(CFLAGS)")
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$(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y)
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endif
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endif
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include scripts/Makefile.lib
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# Do not include host rules unless needed
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@ -83,14 +73,12 @@ __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
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@:
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# Linus' kernel sanity checking tool
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ifneq ($(KBUILD_CHECKSRC),0)
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ifeq ($(KBUILD_CHECKSRC),2)
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quiet_cmd_force_checksrc = CHECK $<
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cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
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else
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ifeq ($(KBUILD_CHECKSRC),1)
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quiet_cmd_checksrc = CHECK $<
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cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
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endif
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else ifeq ($(KBUILD_CHECKSRC),2)
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quiet_cmd_force_checksrc = CHECK $<
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cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
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endif
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ifneq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),)
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@ -495,28 +483,12 @@ targets += $(obj)/lib-ksyms.o
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endif
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#
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# Rule to link composite objects
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#
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# Composite objects are specified in kbuild makefile as follows:
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# <composite-object>-objs := <list of .o files>
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# or
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# <composite-object>-y := <list of .o files>
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# or
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# <composite-object>-m := <list of .o files>
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# The -m syntax only works if <composite object> is a module
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link_multi_deps = \
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$(filter $(addprefix $(obj)/, \
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$($(subst $(obj)/,,$(@:.o=-objs))) \
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$($(subst $(obj)/,,$(@:.o=-y))) \
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$($(subst $(obj)/,,$(@:.o=-m)))), $^)
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quiet_cmd_link_multi-m = LD [M] $@
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cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
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cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^) $(cmd_secanalysis)
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$(multi-used-m): FORCE
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$(call if_changed,link_multi-m)
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@{ echo $(@:.o=.ko); echo $(link_multi_deps); \
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@{ echo $(@:.o=.ko); echo $(filter %.o,$^); \
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$(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod)
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$(call multi_depend, $(multi-used-m), .o, -objs -y -m)
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@ -413,7 +413,7 @@ static void tokenise(char *buffer, char *end)
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/* Handle string tokens */
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if (isalpha(*p)) {
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const char **dir, *start = p;
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const char **dir;
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/* Can be a directive, type name or element
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* name. Find the end of the name.
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@ -48,8 +48,6 @@ static unsigned long long relative_base;
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static struct addr_range text_ranges[] = {
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{ "_stext", "_etext" },
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{ "_sinittext", "_einittext" },
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{ "_stext_l1", "_etext_l1" }, /* Blackfin on-chip L1 inst SRAM */
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{ "_stext_l2", "_etext_l2" }, /* Blackfin on-chip L2 SRAM */
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};
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#define text_range_text (&text_ranges[0])
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#define text_range_inittext (&text_ranges[1])
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@ -405,7 +403,7 @@ static void write_src(void)
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}
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output_label("kallsyms_num_syms");
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printf("\tPTR\t%u\n", table_cnt);
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printf("\t.long\t%u\n", table_cnt);
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printf("\n");
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/* table of offset markers, that give the offset in the compressed stream
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@ -434,7 +432,7 @@ static void write_src(void)
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output_label("kallsyms_markers");
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for (i = 0; i < ((table_cnt + 255) >> 8); i++)
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printf("\tPTR\t%d\n", markers[i]);
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printf("\t.long\t%u\n", markers[i]);
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printf("\n");
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free(markers);
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@ -6,31 +6,20 @@
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# Usage
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# $1 - Kernel src directory
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# $2 - Output directory
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# $3 - version
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# $4 - patchlevel
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test ! -r $2/Makefile -o -O $2/Makefile || exit 0
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# Only overwrite automatically generated Makefiles
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# (so we do not overwrite kernel Makefile)
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if test -e $2/Makefile && ! grep -q Automatically $2/Makefile
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if test -e Makefile && ! grep -q Automatically Makefile
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then
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exit 0
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fi
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if [ "${quiet}" != "silent_" ]; then
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echo " GEN $2/Makefile"
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echo " GEN Makefile"
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fi
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cat << EOF > $2/Makefile
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cat << EOF > Makefile
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# Automatically generated by $0: don't edit
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VERSION = $3
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PATCHLEVEL = $4
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lastword = \$(word \$(words \$(1)),\$(1))
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makedir := \$(dir \$(call lastword,\$(MAKEFILE_LIST)))
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ifeq ("\$(origin V)", "command line")
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VERBOSE := \$(V)
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endif
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@ -38,15 +27,12 @@ ifneq (\$(VERBOSE),1)
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Q := @
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endif
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MAKEARGS := -C $1
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MAKEARGS += O=\$(if \$(patsubst /%,,\$(makedir)),\$(CURDIR)/)\$(patsubst %/,%,\$(makedir))
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MAKEFLAGS += --no-print-directory
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.PHONY: __sub-make \$(MAKECMDGOALS)
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__sub-make:
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\$(Q)\$(MAKE) \$(MAKEARGS) \$(MAKECMDGOALS)
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\$(Q)\$(MAKE) -C $1 O=\$(CURDIR) \$(MAKECMDGOALS)
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\$(filter-out __sub-make, \$(MAKECMDGOALS)): __sub-make
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@:
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@ -95,12 +95,20 @@ extern struct devtable *__start___devtable[], *__stop___devtable[];
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*/
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#define DEF_FIELD(m, devid, f) \
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typeof(((struct devid *)0)->f) f = TO_NATIVE(*(typeof(f) *)((m) + OFF_##devid##_##f))
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/* Define a variable v that holds the address of field f of struct devid
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* based at address m. Due to the way typeof works, for a field of type
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* T[N] the variable has type T(*)[N], _not_ T*.
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*/
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#define DEF_FIELD_ADDR_VAR(m, devid, f, v) \
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typeof(((struct devid *)0)->f) *v = ((m) + OFF_##devid##_##f)
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/* Define a variable f that holds the address of field f of struct devid
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* based at address m. Due to the way typeof works, for a field of type
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* T[N] the variable has type T(*)[N], _not_ T*.
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*/
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#define DEF_FIELD_ADDR(m, devid, f) \
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typeof(((struct devid *)0)->f) *f = ((m) + OFF_##devid##_##f)
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DEF_FIELD_ADDR_VAR(m, devid, f, f)
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/* Add a table entry. We test function type matches while we're here. */
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#define ADD_TO_DEVTABLE(device_id, type, function) \
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@ -656,10 +664,13 @@ static void do_pnp_card_entries(void *symval, unsigned long size,
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/* find duplicate, already added value */
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for (i2 = 0; i2 < i && !dup; i2++) {
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DEF_FIELD_ADDR(symval + i2*id_size, pnp_card_device_id, devs);
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DEF_FIELD_ADDR_VAR(symval + i2 * id_size,
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pnp_card_device_id,
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devs, devs_dup);
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for (j2 = 0; j2 < PNP_MAX_DEVICES; j2++) {
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const char *id2 = (char *)(*devs)[j2].id;
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const char *id2 =
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(char *)(*devs_dup)[j2].id;
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if (!id2[0])
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break;
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@ -1415,11 +1426,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
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|||
if (ELF_ST_TYPE(sym->st_info) != STT_OBJECT)
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return;
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/* All our symbols are of form <prefix>__mod_<name>__<identifier>_device_table. */
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name = strstr(symname, "__mod_");
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if (!name)
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/* All our symbols are of form __mod_<name>__<identifier>_device_table. */
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if (strncmp(symname, "__mod_", strlen("__mod_")))
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return;
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name += strlen("__mod_");
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name = symname + strlen("__mod_");
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namelen = strlen(name);
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||||
if (namelen < strlen("_device_table"))
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||||
return;
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||||
|
|
|
|||
Loading…
Reference in New Issue