X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=config%2Fexpr.c;h=9f1de58e9f0c995fba0a0a0cf076be4a18e79ca1;hb=bdb09091452a302db607b14c9025a91d9c09405a;hp=57ebf71291a7497fe06a483a7dd18901e460438f;hpb=37e2beafb358ab3b847fe951d5b17c78f39c43f7;p=carl9170fw.git

diff --git a/config/expr.c b/config/expr.c
index 57ebf71..9f1de58 100644
--- a/config/expr.c
+++ b/config/expr.c
@@ -1,8 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
- * Released under the terms of the GNU GPL v2.0.
  */
 
+#include <ctype.h>
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -252,6 +254,13 @@ static int expr_eq(struct expr *e1, struct expr *e2)
 {
 	int res, old_count;
 
+	/*
+	 * A NULL expr is taken to be yes, but there's also a different way to
+	 * represent yes. expr_is_yes() checks for either representation.
+	 */
+	if (!e1 || !e2)
+		return expr_is_yes(e1) && expr_is_yes(e2);
+
 	if (e1->type != e2->type)
 		return 0;
 	switch (e1->type) {