module/retpoline: Warn about missing retpoline in module

[linux.git] / scripts / mod / modpost.c

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 98314b400a95cd819ad9352518440de1e48db581..54deaa1066cf04a5df710695ed6fa36a7036f9ef 100644 (file)
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -2165,6 +2165,14 @@ static void add_intree_flag(struct buffer *b, int is_intree)
                buf_printf(b, "\nMODULE_INFO(intree, \"Y\");\n");
 }
 
+/* Cannot check for assembler */
+static void add_retpoline(struct buffer *b)
+{
+       buf_printf(b, "\n#ifdef RETPOLINE\n");
+       buf_printf(b, "MODULE_INFO(retpoline, \"Y\");\n");
+       buf_printf(b, "#endif\n");
+}
+
 static void add_staging_flag(struct buffer *b, const char *name)
 {
        static const char *staging_dir = "drivers/staging";
@@ -2506,6 +2514,7 @@ int main(int argc, char **argv)
                err |= check_modname_len(mod);
                add_header(&buf, mod);
                add_intree_flag(&buf, !external_module);
+               add_retpoline(&buf);
                add_staging_flag(&buf, mod->name);
                err |= add_versions(&buf, mod);
                add_depends(&buf, mod, modules);