libnvpair: fix unused, remove argsused

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #12844

module/nvpair/fnvpair.c

@@ -82,13 +82,13 @@ fnvlist_pack(nvlist_t *nvl, size_t *sizep)
 	return (packed);
 }
 
-/*ARGSUSED*/
 void
 fnvlist_pack_free(char *pack, size_t size)
 {
 #ifdef _KERNEL
 	kmem_free(pack, size);
 #else
+	(void) size;
 	free(pack);
 #endif
 }

module/nvpair/nvpair.c

@@ -576,6 +576,7 @@ nvlist_nv_alloc(int kmflag)
 		return (nv_alloc_pushpage);
 	}
 #else
+	(void) kmflag;
 	return (nv_alloc_nosleep);
 #endif /* _KERNEL */
 }
@@ -2296,10 +2297,11 @@ nvlist_add_nvpair(nvlist_t *nvl, nvpair_t *nvp)
  * the values are taken from nvl in the case of duplicates.
  * Return 0 on success.
  */
-/*ARGSUSED*/
 int
 nvlist_merge(nvlist_t *dst, nvlist_t *nvl, int flag)
 {
+	(void) flag;
+
 	if (nvl == NULL || dst == NULL)
 		return (EINVAL);
 
@@ -2803,10 +2805,10 @@ nvs_native_create(nvstream_t *nvs, nvs_native_t *native, char *buf,
 	}
 }
 
-/*ARGSUSED*/
 static void
 nvs_native_destroy(nvstream_t *nvs)
 {
+	(void) nvs;
 }
 
 static int

module/nvpair/nvpair_alloc_fixed.c

@@ -85,11 +85,11 @@ nv_fixed_alloc(nv_alloc_t *nva, size_t size)
 	return ((void *)new);
 }
 
-/*ARGSUSED*/
 static void
 nv_fixed_free(nv_alloc_t *nva, void *buf, size_t size)
 {
 	/* don't free memory in the pre-allocated buffer */
+	(void) nva, (void) buf, (void) size;
 }
 
 static void