kconfig: remove E_LIST expression type

E_LIST was preveously used to form an expression tree consisting of
choice members.

It is no longer used.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/expr.c

@@ -90,7 +90,6 @@ struct expr *expr_copy(const struct expr *org)
 		break;
 	case E_AND:
 	case E_OR:
-	case E_LIST:
 		e->left.expr = expr_copy(org->left.expr);
 		e->right.expr = expr_copy(org->right.expr);
 		break;
@@ -286,7 +285,6 @@ int expr_eq(struct expr *e1, struct expr *e2)
 		expr_free(e2);
 		trans_count = old_count;
 		return res;
-	case E_LIST:
 	case E_RANGE:
 	case E_NONE:
 		/* panic */;
@@ -676,7 +674,6 @@ struct expr *expr_transform(struct expr *e)
 	case E_LTH:
 	case E_UNEQUAL:
 	case E_SYMBOL:
-	case E_LIST:
 		break;
 	default:
 		e->left.expr = expr_transform(e->left.expr);
@@ -947,7 +944,6 @@ struct expr *expr_trans_compare(struct expr *e, enum expr_type type, struct symb
 		break;
 	case E_SYMBOL:
 		return expr_alloc_comp(type, e->left.sym, sym);
-	case E_LIST:
 	case E_RANGE:
 	case E_NONE:
 		/* panic */;
@@ -1097,10 +1093,6 @@ static int expr_compare_type(enum expr_type t1, enum expr_type t2)
 		if (t2 == E_OR)
 			return 1;
 		/* fallthrough */
-	case E_OR:
-		if (t2 == E_LIST)
-			return 1;
-		/* fallthrough */
 	default:
 		break;
 	}
@@ -1173,13 +1165,6 @@ void expr_print(struct expr *e,
 		fn(data, NULL, " && ");
 		expr_print(e->right.expr, fn, data, E_AND);
 		break;
-	case E_LIST:
-		fn(data, e->right.sym, e->right.sym->name);
-		if (e->left.expr) {
-			fn(data, NULL, " ^ ");
-			expr_print(e->left.expr, fn, data, E_LIST);
-		}
-		break;
 	case E_RANGE:
 		fn(data, NULL, "[");
 		fn(data, e->left.sym, e->left.sym->name);

scripts/kconfig/expr.h

@@ -26,7 +26,7 @@ typedef enum tristate {
 enum expr_type {
 	E_NONE, E_OR, E_AND, E_NOT,
 	E_EQUAL, E_UNEQUAL, E_LTH, E_LEQ, E_GTH, E_GEQ,
-	E_LIST, E_SYMBOL, E_RANGE
+	E_SYMBOL, E_RANGE
 };
 
 union expr_data {

scripts/kconfig/symbol.c

@@ -1316,8 +1316,7 @@ struct symbol *sym_check_deps(struct symbol *sym)
 
 struct symbol *prop_get_symbol(struct property *prop)
 {
-	if (prop->expr && (prop->expr->type == E_SYMBOL ||
-			   prop->expr->type == E_LIST))
+	if (prop->expr && prop->expr->type == E_SYMBOL)
 		return prop->expr->left.sym;
 	return NULL;
 }