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modpost: do not invoke extra modpost for nsdeps 

'make nsdeps' invokes the modpost three times at most; before linking
vmlinux, before building modules, and finally for generating .ns_deps
files. Running the modpost again and again is not efficient.

The last two can be unified. When the -d option is given, the modpost
still does the usual job, and in addition, generates .ns_deps files.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Matthias Maennich <maennich@google.com>
Reviewed-by: Matthias Maennich <maennich@google.com>
This commit is contained in:
Masahiro Yamada 2019-10-29 21:38:06 +09:00
parent faade96102
commit bff9c62b5d
3 changed files with 7 additions and 15 deletions
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5
Makefile
View File

@ -1684,10 +1684,9 @@ tags TAGS cscope gtags: FORCE
# ---------------------------------------------------------------------------
PHONY += nsdeps
nsdeps: export KBUILD_NSDEPS=1
nsdeps: modules
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost nsdeps
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
# Scripts to check various things for consistency
# ---------------------------------------------------------------------------

8
scripts/Makefile.modpost
View File

@ -53,8 +53,7 @@ MODPOST = scripts/mod/modpost \
$(if $(KBUILD_EXTMOD),$(addprefix -e ,$(KBUILD_EXTRA_SYMBOLS))) \
$(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \
$(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \
$(if $(KBUILD_MODPOST_WARN),-w) \
$(if $(filter nsdeps,$(MAKECMDGOALS)),-d)
$(if $(KBUILD_MODPOST_WARN),-w)
ifdef MODPOST_VMLINUX
@ -66,7 +65,8 @@ __modpost:
else
MODPOST += $(subst -i,-n,$(filter -i,$(MAKEFLAGS))) -s -T -
MODPOST += $(subst -i,-n,$(filter -i,$(MAKEFLAGS))) -s -T - \
$(if $(KBUILD_NSDEPS),-d)
ifeq ($(KBUILD_EXTMOD),)
MODPOST += $(wildcard vmlinux)
@ -96,8 +96,6 @@ ifneq ($(KBUILD_MODPOST_NOFINAL),1)
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
endif
nsdeps: __modpost
endif
.PHONY: $(PHONY)

9
scripts/mod/modpost.c
View File

@ -2221,8 +2221,7 @@ static int check_exports(struct module *mod)
add_namespace(&mod->required_namespaces,
exp->namespace);
if (!write_namespace_deps &&
!module_imports_namespace(mod, exp->namespace)) {
if (!module_imports_namespace(mod, exp->namespace)) {
warn("module %s uses symbol %s from namespace %s, but does not import it.\n",
basename, exp->name, exp->namespace);
}
@ -2642,8 +2641,6 @@ int main(int argc, char **argv)
err |= check_modname_len(mod);
err |= check_exports(mod);
if (write_namespace_deps)
continue;
add_header(&buf, mod);
add_intree_flag(&buf, !external_module);
@ -2658,10 +2655,8 @@ int main(int argc, char **argv)
write_if_changed(&buf, fname);
}
if (write_namespace_deps) {
if (write_namespace_deps)
write_namespace_deps_files();
return 0;
}
if (dump_write)
write_dump(dump_write);