Commit 54b77847 authored by Jessica Yu's avatar Jessica Yu Committed by Masahiro Yamada
Browse files

modpost: return error if module is missing ns imports and MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS=n



Currently when CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS=n, modpost
only warns when a module is missing namespace imports. Under this
configuration, such a module cannot be loaded into the kernel anyway, as
the module loader would reject it. We might as well return a build
error when a module is missing namespace imports under
CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS=n, so that the build
warning does not go ignored/unnoticed.

Signed-off-by: default avatarJessica Yu <jeyu@kernel.org>
Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
parent 93c95e52
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+8 −7
Original line number Diff line number Diff line
@@ -53,6 +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 $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N) 	\
	$(if $(KBUILD_MODPOST_WARN),-w)

ifdef MODPOST_VMLINUX
+11 −3
Original line number Diff line number Diff line
@@ -39,6 +39,8 @@ static int sec_mismatch_count = 0;
static int sec_mismatch_fatal = 0;
/* ignore missing files */
static int ignore_missing_files;
/* If set to 1, only warn (instead of error) about missing ns imports */
static int allow_missing_ns_imports;

enum export {
	export_plain,      export_unused,     export_gpl,
@@ -2205,8 +2207,11 @@ static int check_exports(struct module *mod)

		if (exp->namespace &&
		    !module_imports_namespace(mod, exp->namespace)) {
			warn("module %s uses symbol %s from namespace %s, but does not import it.\n",
			modpost_log(allow_missing_ns_imports ? LOG_WARN : LOG_ERROR,
				    "module %s uses symbol %s from namespace %s, but does not import it.\n",
				    basename, exp->name, exp->namespace);
			if (!allow_missing_ns_imports)
				err = 1;
			add_namespace(&mod->missing_namespaces, exp->namespace);
		}

@@ -2549,7 +2554,7 @@ int main(int argc, char **argv)
	struct ext_sym_list *extsym_iter;
	struct ext_sym_list *extsym_start = NULL;

	while ((opt = getopt(argc, argv, "i:e:mnsT:o:awEd:")) != -1) {
	while ((opt = getopt(argc, argv, "i:e:mnsT:o:awENd:")) != -1) {
		switch (opt) {
		case 'i':
			kernel_read = optarg;
@@ -2587,6 +2592,9 @@ int main(int argc, char **argv)
		case 'E':
			sec_mismatch_fatal = 1;
			break;
		case 'N':
			allow_missing_ns_imports = 1;
			break;
		case 'd':
			missing_namespace_deps = optarg;
			break;