kconfig: tristate choices with mixed tristate and boolean values

Change kconfig behavior so that mixing bool and tristate config settings in
a choice is possible and has the desired effect of offering just the
tristate options individually if the choice gets set to M, and a normal
boolean selection if the choice gets set to Y.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index f9d0d91..7bfa181 100644 (file)
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -235,16 +235,23 @@ void menu_finalize(struct menu *parent)
        sym = parent->sym;
        if (parent->list) {
                if (sym && sym_is_choice(sym)) {
-                       /* find the first choice value and find out choice type */
+                       /* find out choice type */
+                       enum symbol_type type = S_UNKNOWN;
+
                        for (menu = parent->list; menu; menu = menu->next) {
-                               if (menu->sym) {
-                                       current_entry = parent;
-                                       menu_set_type(menu->sym->type);
-                                       current_entry = menu;
-                                       menu_set_type(sym->type);
-                                       break;
+                               if (menu->sym && menu->sym->type != S_UNKNOWN) {
+                                       if (type == S_UNKNOWN)
+                                               type = menu->sym->type;
+                                       if (type != S_BOOLEAN)
+                                               break;
+                                       if (menu->sym->type == S_TRISTATE) {
+                                               type = S_TRISTATE;
+                                               break;
+                                       }
                                }
                        }
+                       current_entry = parent;
+                       menu_set_type(type);
                        parentdep = expr_alloc_symbol(sym);
                } else if (parent->prompt)
                        parentdep = parent->prompt->visible.expr;
@@ -253,7 +260,16 @@ void menu_finalize(struct menu *parent)
 
                for (menu = parent->list; menu; menu = menu->next) {
                        basedep = expr_transform(menu->dep);
-                       basedep = expr_alloc_and(expr_copy(parentdep), basedep);
+                       dep = parentdep;
+                       if (sym && sym_is_choice(sym) && menu->sym) {
+                               enum symbol_type type = menu->sym->type;
+
+                               if (type == S_UNKNOWN)
+                                       type = sym->type;
+                            if (type != S_TRISTATE)
+                                       dep = expr_alloc_comp(E_EQUAL, sym, &symbol_yes);
+                       }
+                       basedep = expr_alloc_and(expr_copy(dep), basedep);
                        basedep = expr_eliminate_dups(basedep);
                        menu->dep = basedep;
                        if (menu->sym)
@@ -326,7 +342,8 @@ void menu_finalize(struct menu *parent)
                                            "values not supported");
                        }
                        current_entry = menu;
-                       menu_set_type(sym->type);
+                       if (menu->sym->type == S_UNKNOWN)
+                               menu_set_type(sym->type);
                        menu_add_symbol(P_CHOICE, sym, NULL);
                        prop = sym_get_choice_prop(sym);
                        for (ep = &prop->expr; *ep; ep = &(*ep)->left.expr)