These are the commands supported by the modctl system call

include/os/freebsd/zfs/sys/freebsd_crypto.h

@@ -42,8 +42,6 @@
 #define	SUN_CKM_AES_GCM	"CKM_AES_GCM"
 #define	SUN_CKM_SHA512_HMAC	"CKM_SHA512_HMAC"
 
-#define	CRYPTO_KEY_RAW	1
-
 #define	CRYPTO_BITS2BYTES(n) ((n) == 0 ? 0 : (((n) - 1) >> 3) + 1)
 #define	CRYPTO_BYTES2BITS(n) ((n) << 3)
 
@@ -61,12 +59,11 @@ typedef struct freebsd_crypt_session {
 typedef void *crypto_mechanism_t;
 typedef void *crypto_ctx_template_t;
 /*
- * Unlike the ICP crypto_key type, this only
+ * Like the ICP crypto_key type, this only
  * supports <data, length> (the equivalent of
- * CRYPTO_KEY_RAW).
+ * the former CRYPTO_KEY_RAW).
  */
 typedef struct crypto_key {
-	int	ck_format;	/* Unused, but minimizes code diff */
 	void	*ck_data;
 	size_t	ck_length;
 } crypto_key_t;

include/os/freebsd/zfs/sys/sha2.h

@@ -33,9 +33,6 @@
 extern "C" {
 #endif
 
-#define	SHA2_HMAC_MIN_KEY_LEN	1	/* SHA2-HMAC min key length in bytes */
-#define	SHA2_HMAC_MAX_KEY_LEN	INT_MAX	/* SHA2-HMAC max key length in bytes */
-
 #define	SHA256_DIGEST_LENGTH	32	/* SHA256 digest length in bytes */
 #define	SHA384_DIGEST_LENGTH	48	/* SHA384 digest length in bytes */
 #define	SHA512_DIGEST_LENGTH	64	/* SHA512 digest length in bytes */

include/os/linux/spl/sys/taskq.h

@@ -163,8 +163,6 @@ extern taskq_t *taskq_of_curthread(void);
 	((void) sizeof (dc), \
 	    taskq_create(name, nthreads, maxclsyspri, min, max, flags))
 
-extern boolean_t taskq_empty(taskq_t *);
-
 int spl_taskq_init(void);
 void spl_taskq_fini(void);
 

include/os/linux/zfs/sys/sha2.h

@@ -33,9 +33,6 @@
 extern "C" {
 #endif
 
-#define	SHA2_HMAC_MIN_KEY_LEN	1	/* SHA2-HMAC min key length in bytes */
-#define	SHA2_HMAC_MAX_KEY_LEN	INT_MAX	/* SHA2-HMAC max key length in bytes */
-
 #define	SHA256_DIGEST_LENGTH	32	/* SHA256 digest length in bytes */
 #define	SHA384_DIGEST_LENGTH	48	/* SHA384 digest length in bytes */
 #define	SHA512_DIGEST_LENGTH	64	/* SHA512 digest length in bytes */