kbuild: make .mod not depend on .o

The dependency $(obj)/%.mod: $(obj)/%$(mod-prelink-ext).o ... exists because *.mod files previously contained undefined symbols, which are computed from *.o files when CONFIG_TRIM_UNUSED_KSYMS=y. Now that the undefined symbols are put into separate *.usyms files, there is no reason to make *.mod depend on *.o files.

Masahiro Yamada committed 4 years ago

Commit fc93a4c1 parent 22f26f22 files · +4 −4Browse files

Showing the changes to scripts (1 of 2 files). Show all

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scripts/Makefile.build+2−3

 targets-for-builtin += $(obj)/built-in.a
 endif
-targets-for-modules := $(foreach x, mod $(if $(CONFIG_TRIM_UNUSED_KSYMS), usyms), \
+targets-for-modules := $(foreach x, o mod $(if $(CONFIG_TRIM_UNUSED_KSYMS), usyms), \
 				$(patsubst %.o, %.$x, $(filter %.o, $(obj-m))))
 ifneq ($(CONFIG_LTO_CLANG)$(CONFIG_X86_KERNEL_IBT),)
 cmd_mod = echo $(addprefix $(obj)/, $(call real-search, $*.o, .o, -objs -y -m)) | \
 	$(AWK) -v RS='( |\n)' '!x[$$0]++' > $@
-$(obj)/%.mod: $(obj)/%$(mod-prelink-ext).o FORCE
+$(obj)/%.mod: FORCE
 	$(call if_changed,mod)
 # List module undefined symbols
 	$(call if_changed,link_multi-m)
 $(call multi_depend, $(multi-obj-m), .o, -objs -y -m)
-targets += $(multi-obj-m)
 targets := $(filter-out $(PHONY), $(targets))
 # Add intermediate targets: