modpost: remove is_vmlinux() call in check_for_{gpl_usage,unused}()

check_exports() is never called for vmlinux because mod->skip is set
for vmlinux.

Hence, check_for_gpl_usage() and check_for_unused() are not called
for vmlinux, either. is_vmlinux() is always false here.

Remove the is_vmlinux() calls, and hard-code the ".ko" suffix.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/mod/modpost.c

@@ -2144,20 +2144,18 @@ void buf_write(struct buffer *buf, const char *s, int len)
 
 static void check_for_gpl_usage(enum export exp, const char *m, const char *s)
 {
-	const char *e = is_vmlinux(m) ?"":".ko";
-
 	switch (exp) {
 	case export_gpl:
-		fatal("GPL-incompatible module %s%s "
-		      "uses GPL-only symbol '%s'\n", m, e, s);
+		fatal("GPL-incompatible module %s.ko uses GPL-only symbol '%s'\n",
+		      m, s);
 		break;
 	case export_unused_gpl:
-		fatal("GPL-incompatible module %s%s "
-		      "uses GPL-only symbol marked UNUSED '%s'\n", m, e, s);
+		fatal("GPL-incompatible module %s.ko uses GPL-only symbol marked UNUSED '%s'\n",
+		      m, s);
 		break;
 	case export_gpl_future:
-		warn("GPL-incompatible module %s%s "
-		      "uses future GPL-only symbol '%s'\n", m, e, s);
+		warn("GPL-incompatible module %s.ko uses future GPL-only symbol '%s'\n",
+		     m, s);
 		break;
 	case export_plain:
 	case export_unused:
@@ -2169,13 +2167,11 @@ static void check_for_gpl_usage(enum export exp, const char *m, const char *s)
 
 static void check_for_unused(enum export exp, const char *m, const char *s)
 {
-	const char *e = is_vmlinux(m) ?"":".ko";
-
 	switch (exp) {
 	case export_unused:
 	case export_unused_gpl:
-		warn("module %s%s "
-		      "uses symbol '%s' marked UNUSED\n", m, e, s);
+		warn("module %s.ko uses symbol '%s' marked UNUSED\n",
+		     m, s);
 		break;
 	default:
 		/* ignore */