diff options
Diffstat (limited to 'scripts/kconfig/menu.c')
| -rw-r--r-- | scripts/kconfig/menu.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c index b5c7d90df9df..7e233a6ca64e 100644 --- a/scripts/kconfig/menu.c +++ b/scripts/kconfig/menu.c @@ -146,11 +146,24 @@ struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *e struct menu *menu = current_entry; while ((menu = menu->parent) != NULL) { + struct expr *dup_expr; + if (!menu->visibility) continue; + /* + * Do not add a reference to the + * menu's visibility expression but + * use a copy of it. Otherwise the + * expression reduction functions + * will modify expressions that have + * multiple references which can + * cause unwanted side effects. + */ + dup_expr = expr_copy(menu->visibility); + prop->visible.expr = expr_alloc_and(prop->visible.expr, - menu->visibility); + dup_expr); } } @@ -430,6 +443,22 @@ bool menu_has_prompt(struct menu *menu) return true; } +/* + * Determine if a menu is empty. + * A menu is considered empty if it contains no or only + * invisible entries. + */ +bool menu_is_empty(struct menu *menu) +{ + struct menu *child; + + for (child = menu->list; child; child = child->next) { + if (menu_is_visible(child)) + return(false); + } + return(true); +} + bool menu_is_visible(struct menu *menu) { struct menu *child; |