kconfig: clear expr::val_is_valid when allocated

Since commit 95573cac25c6 ("kconfig: cache expression values"), xconfig
emits a lot of false-positive "unmet direct dependencies" warnings.

While conf_read() clears val_is_valid flags, 'make xconfig' calculates
symbol values even before the conf_read() call. This is another issue
that should be addressed separately, but it has revealed that the
val_is_valid field is not initialized.

Fixes: 95573cac25c6 ("kconfig: cache expression values")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/scripts/kconfig/expr.c b/scripts/kconfig/expr.c
index 78738ef412de2e42ac82eb0718462c2ea7f2e853..16f92c4a775a13f053c636598df70702b8fe7c4d 100644 (file)
--- a/scripts/kconfig/expr.c
+++ b/scripts/kconfig/expr.c
@@ -47,6 +47,7 @@ static struct expr *expr_lookup(enum expr_type type, void *l, void *r)
        e->type = type;
        e->left._initdata = l;
        e->right._initdata = r;
+       e->val_is_valid = false;
 
        hash_add(expr_hashtable, &e->node, hash);