kconfig: correct oldconfig for unset choice options

oldconfig currently ignores unset choice options and doesn't ask for them.
Correct the SYMBOL_DEF_USER flag of the choice symbol to be only set if
it's set for all values.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 2ee48c377b66..a69d8acbf274 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -357,7 +357,7 @@ int conf_read(const char *name)
                 for (e = prop->expr; e; e = e->left.expr)
                         if (e->right.sym->visible != no)
                                 flags &= e->right.sym->flags;
-                sym->flags |= flags & SYMBOL_DEF_USER;
+                sym->flags &= flags | ~SYMBOL_DEF_USER;
         }
 
         sym_change_count += conf_warnings || conf_unsaved;