_PROTOTYPE( int bitmapsize, (bit_t _nr_bits)				);
_PROTOTYPE( unsigned conv2, (int _norm, int _w)				);
_PROTOTYPE( long conv4, (int _norm, long _x)				);
_PROTOTYPE( void conv_inode, (struct inode *_rip, d1_inode *_dip,
			     d2_inode *_dip2, int _rw_flag, int _magic)	);
_PROTOTYPE( void old_icopy, (struct inode *_rip, d1_inode *_dip,
					      int _direction, int _norm));
_PROTOTYPE( void new_icopy, (struct inode *_rip, d2_inode *_dip,
					      int _direction, int _norm));
