update-index/diff-index: use core.preloadindex to improve performance

diff --git a/parse-options-cb.c b/parse-options-cb.c
index 6db0921fc1fde3b5fbf829577bdd019ae95462e0..0de5fb168a5c1b86c50be0d0c3f2d7228e7159a1 100644 (file)
--- a/parse-options-cb.c
+++ b/parse-options-cb.c
@@ -123,3 +123,8 @@ int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
        string_list_append(v, xstrdup(arg));
        return 0;
 }
+
+int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
+{
+       return 0;
+}