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kbuild: refactor the prerequisites of the modpost rule

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The prerequisites of modpost are cluttered. The variables *-if-present
and *-if-needed are unreadable.

It is cleaner to append them into modpost-deps.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Masahiro Yamada 2022-12-11 22:04:08 +09:00
parent f65a486821
commit 3d57e1b7b1
1 changed files with 22 additions and 14 deletions
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36
scripts/Makefile.modpost
View file

@ -38,6 +38,8 @@ __modpost:
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
MODPOST = scripts/mod/modpost
modpost-args = \
$(if $(CONFIG_MODVERSIONS),-m) \
$(if $(CONFIG_MODULE_SRCVERSION_ALL),-a) \
@ -46,6 +48,8 @@ modpost-args = \
$(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N) \
-o $@
modpost-deps := $(MODPOST)
# 'make -i -k' ignores compile errors, and builds as many modules as possible.
ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)
modpost-args += -n
@ -78,12 +82,13 @@ targets += .vmlinux.objs
.vmlinux.objs: vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE
$(call if_changed,vmlinux_objs)
vmlinux.o-if-present := $(wildcard vmlinux.o)
output-symdump := vmlinux.symvers
ifdef KBUILD_MODULES
output-symdump := $(if $(vmlinux.o-if-present), Module.symvers, modules-only.symvers)
missing-input := $(filter-out $(vmlinux.o-if-present),vmlinux.o)
ifeq ($(wildcard vmlinux.o),)
missing-input := vmlinux.o
output-symdump := modules-only.symvers
else
modpost-args += vmlinux.o
modpost-deps += vmlinux.o
output-symdump := $(if $(KBUILD_MODULES), Module.symvers, vmlinux.symvers)
endif
else
@ -95,11 +100,16 @@ src := $(obj)
# Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS
include $(kbuild-file)
module.symvers-if-present := $(wildcard Module.symvers)
output-symdump := $(KBUILD_EXTMOD)/Module.symvers
missing-input := $(filter-out $(module.symvers-if-present), Module.symvers)
modpost-args += -e $(addprefix -i ,$(module.symvers-if-present) $(KBUILD_EXTRA_SYMBOLS))
ifeq ($(wildcard Module.symvers),)
missing-input := Module.symvers
else
modpost-args += -i Module.symvers
modpost-deps += Module.symvers
endif
modpost-args += -e $(addprefix -i , $(KBUILD_EXTRA_SYMBOLS))
endif # ($(KBUILD_EXTMOD),)
@ -108,12 +118,10 @@ modpost-args += -w
endif
ifdef KBUILD_MODULES
modorder-if-needed := $(MODORDER)
modpost-args += -T $(MODORDER)
modpost-deps += $(MODORDER)
endif
MODPOST = scripts/mod/modpost
# Read out modules.order to pass in modpost.
# Otherwise, allmodconfig would fail with "Argument list too long".
quiet_cmd_modpost = MODPOST $@
@ -122,10 +130,10 @@ quiet_cmd_modpost = MODPOST $@
echo >&2 "WARNING: $(missing-input) is missing."; \
echo >&2 " Modules may not have dependencies or modversions."; \
echo >&2 " You may get many unresolved symbol warnings.";) \
$(MODPOST) $(modpost-args) $(vmlinux.o-if-present)
$(MODPOST) $(modpost-args)
targets += $(output-symdump)
$(output-symdump): $(modorder-if-needed) $(vmlinux.o-if-present) $(module.symvers-if-present) $(MODPOST) FORCE
$(output-symdump): $(modpost-deps) FORCE
$(call if_changed,modpost)
__modpost: $(output-symdump)