git-compat-util.h: use "UNUSED", not "UNUSED(var)"

As reported in [1] the "UNUSED(var)" macro introduced in
2174b8c75de (Merge branch 'jk/unused-annotation' into next,
2022-08-24) breaks coccinelle's parsing of our sources in files where
it occurs.

Let's instead partially go with the approach suggested in [2] of
making this not take an argument. As noted in [1] "coccinelle" will
ignore such tokens in argument lists that it doesn't know about, and
it's less of a surprise to syntax highlighters.

This undoes the "help us notice when a parameter marked as unused is
actually use" part of 9b240347543 (git-compat-util: add UNUSED macro,
2022-08-19), a subsequent commit will further tweak the macro to
implement a replacement for that functionality.

1. https://lore.kernel.org/git/220825.86ilmg4mil.gmgdl@evledraar.gmail.com/
2. https://lore.kernel.org/git/220819.868rnk54ju.gmgdl@evledraar.gmail.com/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/hashmap.c b/hashmap.c
index 763aa1d8a3..cf5fea87eb 100644
--- a/hashmap.c
+++ b/hashmap.c
@@ -142,10 +142,10 @@ static inline struct hashmap_entry **find_entry_ptr(const struct hashmap *map,
 	return e;
 }
 
-static int always_equal(const void *UNUSED(cmp_data),
-			const struct hashmap_entry *UNUSED(entry1),
-			const struct hashmap_entry *UNUSED(entry2),
-			const void *UNUSED(keydata))
+static int always_equal(const void *cmp_data UNUSED,
+			const struct hashmap_entry *entry1 UNUSED,
+			const struct hashmap_entry *entry2 UNUSED,
+			const void *keydata UNUSED)
 {
 	return 0;
 }
@@ -313,7 +313,7 @@ struct pool_entry {
 	unsigned char data[FLEX_ARRAY];
 };
 
-static int pool_entry_cmp(const void *UNUSED(cmp_data),
+static int pool_entry_cmp(const void *cmp_data UNUSED,
 			  const struct hashmap_entry *eptr,
 			  const struct hashmap_entry *entry_or_key,
 			  const void *keydata)