kconfig: remove string expansion for mainmenu after yyparse()

Now that environments are expanded in the lexer, conf_parse() does
not need to expand them explicitly.

The hack introduced by commit 0724a7c32a54 ("kconfig: Don't leak
main menus during parsing") can go away.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>

1 files changed, 5 insertions, 19 deletions

diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
index 031b2e24ae00..22e318c1d3d1 100644
--- a/scripts/kconfig/zconf.y
+++ b/scripts/kconfig/zconf.y
@@ -109,7 +109,7 @@ static struct menu *current_menu, *current_entry;
 %%
 input: nl start | start;
 
-start: mainmenu_stmt stmt_list | no_mainmenu_stmt stmt_list;
+start: mainmenu_stmt stmt_list | stmt_list;
 
 /* mainmenu entry */
 
@@ -118,19 +118,6 @@ mainmenu_stmt: T_MAINMENU prompt nl
         menu_add_prompt(P_MENU, $2, NULL);
 };
 
-/* Default main menu, if there's no mainmenu entry */
-
-no_mainmenu_stmt: /* empty */
-{
-        /*
-         * Hack: Keep the main menu title on the heap so we can safely free it
-         * later regardless of whether it comes from the 'prompt' in
-         * mainmenu_stmt or here
-         */
-        menu_add_prompt(P_MENU, xstrdup("Linux Kernel Configuration"), NULL);
-};
-
-
 stmt_list:
           /* empty */
         | stmt_list common_stmt
@@ -528,7 +515,6 @@ word_opt: /* empty */			{ $$ = NULL; }
 
 void conf_parse(const char *name)
 {
-        const char *tmp;
         struct symbol *sym;
         int i;
 
@@ -544,10 +530,10 @@ void conf_parse(const char *name)
         if (!modules_sym)
                 modules_sym = sym_find( "n" );
 
-        tmp = rootmenu.prompt->text;
-        rootmenu.prompt->text = rootmenu.prompt->text;
-        rootmenu.prompt->text = sym_expand_string_value(rootmenu.prompt->text);
-        free((char*)tmp);
+        if (!menu_has_prompt(&rootmenu)) {
+                current_entry = &rootmenu;
+                menu_add_prompt(P_MENU, "Linux Kernel Configuration", NULL);
+        }
 
         menu_finalize(&rootmenu);
         for_all_symbols(i, sym) {