hashmap: mark unused callback parameters

Hashmap comparison functions must conform to a particular callback
interface, but many don't use all of their parameters. Especially the
void cmp_data pointer, but some do not use keydata either (because they
can easily form a full struct to pass when doing lookups). Let's mark
these to make -Wunused-parameter happy.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/refs.c b/refs.c
index 38b1165189..5012bba357 100644
--- a/refs.c
+++ b/refs.c
@@ -1815,7 +1815,7 @@ struct ref_store_hash_entry
 	char name[FLEX_ARRAY];
 };
 
-static int ref_store_hash_cmp(const void *unused_cmp_data,
+static int ref_store_hash_cmp(const void *UNUSED(cmp_data),
 			      const struct hashmap_entry *eptr,
 			      const struct hashmap_entry *entry_or_key,
 			      const void *keydata)