bcache: Don't export utility code, prefix with bch_

Signed-off-by: Kent Overstreet <koverstreet@google.com>
Cc: linux-bcache@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h
index b2846e7..f057235 100644
--- a/drivers/md/bcache/bcache.h
+++ b/drivers/md/bcache/bcache.h
@@ -1033,7 +1033,7 @@
  * jset: The checksum is _always_ the first 8 bytes of these structs
  */
 #define csum_set(i)							\
-	crc64(((void *) (i)) + sizeof(uint64_t),			\
+	bch_crc64(((void *) (i)) + sizeof(uint64_t),			\
 	      ((void *) end(i)) - (((void *) (i)) + sizeof(uint64_t)))
 
 /* Error handling macros */