kconfig: explicitly introduce expression list

Rename E_CHOICE to E_LIST to explicitly add support for expression
lists. Add a helper macro expr_list_for_each_sym to more easily iterate
over the list.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index 1ee8b1642d3b..b6f922c77e0b 100644
--- a/scripts/kconfig/expr.h
+++ b/scripts/kconfig/expr.h
@@ -31,7 +31,7 @@ typedef enum tristate {
 } tristate;
 
 enum expr_type {
-        E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_CHOICE, E_SYMBOL, E_RANGE
+        E_NONE, E_OR, E_AND, E_NOT, E_EQUAL, E_UNEQUAL, E_LIST, E_SYMBOL, E_RANGE
 };
 
 union expr_data {
@@ -48,6 +48,9 @@ struct expr {
 #define EXPR_AND(dep1, dep2)    (((dep1)<(dep2))?(dep1):(dep2))
 #define EXPR_NOT(dep)           (2-(dep))
 
+#define expr_list_for_each_sym(l, e, s) \
+        for (e = (l); e && (s = e->right.sym); e = e->left.expr)
+
 struct expr_value {
         struct expr *expr;
         tristate tri;