diff mbox series

[18/29] modpost: show warning if vmlinux is not found when processing modules

Message ID 20200517094859.2376211-19-masahiroy@kernel.org (mailing list archive)
State New, archived
Headers show
Series modpost: various fixes, cleanups, optimizations | expand

Commit Message

Masahiro Yamada May 17, 2020, 9:48 a.m. UTC
check_exports() does not print warnings about unresolved symbols if
vmlinux is missing because there would be too many.

This situation happens when you do 'make modules' from the clean
tree, or compile external modules against a kernel tree that has
not been completely built.

Not checking unresolved symbols is dangerous because you might be
building useless modules. At least it should be noted.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

 scripts/mod/modpost.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index b14ecfbfd640..8150be00e3df 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -2004,8 +2004,6 @@  static void read_symbols(const char *modname)
 
 	mod = new_module(modname);
 
-	/* When there's no vmlinux, don't print warnings about
-	 * unresolved symbols (since there'll be too many ;) */
 	if (is_vmlinux(modname)) {
 		have_vmlinux = 1;
 		mod->skip = 1;
@@ -2617,6 +2615,13 @@  int main(int argc, char **argv)
 	if (files_source)
 		read_symbols_from_files(files_source);
 
+	/*
+	 * When there's no vmlinux, don't print warnings about
+	 * unresolved symbols (since there'll be too many ;)
+	 */
+	if (!have_vmlinux)
+		warn("Symbol info of vmlinux is missing. Unresolved symbol check will be entirely skipped.\n");
+
 	err = 0;
 
 	for (mod = modules; mod; mod = mod->next) {