modpost: merge add_{intree_flag,retpoline,staging_flag} to add_header

add_intree_flag(), add_retpoline(), and add_staging_flag() are small
enough to be merged into add_header().
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Tested-by: Nathan Chancellor <nathan@kernel.org>

scripts/mod/modpost.c

@@ -2243,25 +2243,17 @@ static void add_header(struct buffer *b, struct module *mod)
 			      "#endif\n");
 	buf_printf(b, "\t.arch = MODULE_ARCH_INIT,\n");
 	buf_printf(b, "};\n");
-}
 
-static void add_intree_flag(struct buffer *b, int is_intree)
-{
-	if (is_intree)
+	if (!external_module)
 		buf_printf(b, "\nMODULE_INFO(intree, \"Y\");\n");
-}
 
-/* Cannot check for assembler */
-static void add_retpoline(struct buffer *b)
-{
-	buf_printf(b, "\n#ifdef CONFIG_RETPOLINE\n");
-	buf_printf(b, "MODULE_INFO(retpoline, \"Y\");\n");
-	buf_printf(b, "#endif\n");
-}
+	buf_printf(b,
+		   "\n"
+		   "#ifdef CONFIG_RETPOLINE\n"
+		   "MODULE_INFO(retpoline, \"Y\");\n"
+		   "#endif\n");
 
-static void add_staging_flag(struct buffer *b, const char *name)
-{
-	if (strstarts(name, "drivers/staging"))
+	if (strstarts(mod->name, "drivers/staging"))
 		buf_printf(b, "\nMODULE_INFO(staging, \"Y\");\n");
 }
 
@@ -2577,9 +2569,6 @@ int main(int argc, char **argv)
 		check_exports(mod);
 
 		add_header(&buf, mod);
-		add_intree_flag(&buf, !external_module);
-		add_retpoline(&buf);
-		add_staging_flag(&buf, mod->name);
 		add_versions(&buf, mod);
 		add_depends(&buf, mod);
 		add_moddevtable(&buf, mod);