kconfig: explain symbol value defaults

Added a few comments - no functional change.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index 9d4cba1..455f2c8 100644 (file)
--- a/scripts/kconfig/expr.h
+++ b/scripts/kconfig/expr.h
@@ -65,9 +65,13 @@ enum symbol_type {
        S_UNKNOWN, S_BOOLEAN, S_TRISTATE, S_INT, S_HEX, S_STRING, S_OTHER
 };
 
+/* enum values are used as index to symbol.def[] */
 enum {
        S_DEF_USER,             /* main user value */
-       S_DEF_AUTO,
+       S_DEF_AUTO,             /* values read from auto.conf */
+       S_DEF_DEF3,             /* Reserved for UI usage */
+       S_DEF_DEF4,             /* Reserved for UI usage */
+       S_DEF_COUNT
 };
 
 struct symbol {
@@ -75,7 +79,7 @@ struct symbol {
        char *name;
        enum symbol_type type;
        struct symbol_value curr;
-       struct symbol_value def[4];
+       struct symbol_value def[S_DEF_COUNT];
        tristate visible;
        int flags;
        struct property *prop;