Mark functions as static

Mark functions used only in the same translation unit as static. This
only includes functions that do not have a prototype in a header file
either.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10470

module/icp/algs/modes/ccm.c

@@ -318,7 +318,7 @@ ccm_encrypt_final(ccm_ctx_t *ctx, crypto_data_t *out, size_t block_size,
  * This will only deal with decrypting the last block of the input that
  * might not be a multiple of block length.
  */
-void
+static void
 ccm_decrypt_incomplete_block(ccm_ctx_t *ctx,
     int (*encrypt_block)(const void *, const uint8_t *, uint8_t *))
 {
@@ -573,7 +573,7 @@ ccm_decrypt_final(ccm_ctx_t *ctx, crypto_data_t *out, size_t block_size,
 	return (CRYPTO_SUCCESS);
 }
 
-int
+static int
 ccm_validate_args(CK_AES_CCM_PARAMS *ccm_param, boolean_t is_encrypt_init)
 {
 	size_t macSize, nonceSize;
@@ -758,11 +758,7 @@ encode_adata_len(ulong_t auth_data_len, uint8_t *encoded, size_t *encoded_len)
 	}
 }
 
-/*
- * The following function should be call at encrypt or decrypt init time
- * for AES CCM mode.
- */
-int
+static int
 ccm_init(ccm_ctx_t *ctx, unsigned char *nonce, size_t nonce_len,
     unsigned char *auth_data, size_t auth_data_len, size_t block_size,
     int (*encrypt_block)(const void *, const uint8_t *, uint8_t *),
@@ -846,6 +842,10 @@ ccm_init(ccm_ctx_t *ctx, unsigned char *nonce, size_t nonce_len,
 	return (CRYPTO_SUCCESS);
 }
 
+/*
+ * The following function should be call at encrypt or decrypt init time
+ * for AES CCM mode.
+ */
 int
 ccm_init_ctx(ccm_ctx_t *ccm_ctx, char *param, int kmflag,
     boolean_t is_encrypt_init, size_t block_size,

module/icp/algs/modes/gcm.c

@@ -518,11 +518,7 @@ gcm_format_initial_blocks(uchar_t *iv, ulong_t iv_len,
 	}
 }
 
-/*
- * The following function is called at encrypt or decrypt init time
- * for AES GCM mode.
- */
-int
+static int
 gcm_init(gcm_ctx_t *ctx, unsigned char *iv, size_t iv_len,
     unsigned char *auth_data, size_t auth_data_len, size_t block_size,
     int (*encrypt_block)(const void *, const uint8_t *, uint8_t *),
@@ -574,6 +570,9 @@ gcm_init(gcm_ctx_t *ctx, unsigned char *iv, size_t iv_len,
 }
 
 /*
+ * The following function is called at encrypt or decrypt init time
+ * for AES GCM mode.
+ *
  * Init the GCM context struct. Handle the cycle and avx implementations here.
  */
 int