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authorMasahiro Yamada <masahiroy@kernel.org>2022-12-11 16:04:08 +0300
committerMasahiro Yamada <masahiroy@kernel.org>2022-12-14 09:42:40 +0300
commit3d57e1b7b1d42d4040f0d993b66ff06beda02c54 (patch)
tree2c6c6ad858e53923dbe574d8701d552a274cea3a /scripts
parentf65a486821cfd363833079b2a7b0769250ee21c9 (diff)
downloadlinux-3d57e1b7b1d42d4040f0d993b66ff06beda02c54.tar.xz
kbuild: refactor the prerequisites of the modpost rule
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>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/Makefile.modpost36
1 files changed, 22 insertions, 14 deletions
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index f814a6acd200..5eb5e8280379 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -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)