kconfig: explain symbol value defaults

Added a few comments - no functional change.

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

1 files changed, 6 insertions, 2 deletions

diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index 9d4cba1c001d..455f2c87ebb4 100644
--- 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;