CIFS: Add readpage support for SMB2

Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index ec983be..97e62f3 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -98,6 +98,8 @@
 			    u64 persistent_fid, u64 volatile_fid,
 			    __le64 *uniqueid);
 extern int smb2_async_readv(struct cifs_readdata *rdata);
+extern int SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
+		     unsigned int *nbytes, char **buf, int *buf_type);
 extern int smb2_async_writev(struct cifs_writedata *wdata);
 extern int SMB2_echo(struct TCP_Server_Info *server);