crypto: export NULL algorithms defines

These defines might be needed by crypto drivers.
Signed-off-by: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/crypto_null.c

@@ -17,6 +17,7 @@
  *
  */
 
+#include <crypto/null.h>
 #include <crypto/internal/hash.h>
 #include <crypto/internal/skcipher.h>
 #include <linux/init.h>
@@ -24,11 +25,6 @@
 #include <linux/mm.h>
 #include <linux/string.h>
 
-#define NULL_KEY_SIZE		0
-#define NULL_BLOCK_SIZE		1
-#define NULL_DIGEST_SIZE	0
-#define NULL_IV_SIZE		0
-
 static int null_compress(struct crypto_tfm *tfm, const u8 *src,
 			 unsigned int slen, u8 *dst, unsigned int *dlen)
 {

include/crypto/null.h

+/* Values for NULL algorithms */
+
+#ifndef _CRYPTO_NULL_H
+#define _CRYPTO_NULL_H
+
+#define NULL_KEY_SIZE		0
+#define NULL_BLOCK_SIZE		1
+#define NULL_DIGEST_SIZE	0
+#define NULL_IV_SIZE		0
+
+#endif