extern void iob_pad ( struct io_buffer *iobuf, size_t min_len );
extern int iob_ensure_headroom ( struct io_buffer *iobuf, size_t len );
extern struct io_buffer * iob_concatenate ( struct list_head *list );
extern void iob_pad ( struct io_buffer *iobuf, size_t min_len );
extern int iob_ensure_headroom ( struct io_buffer *iobuf, size_t len );
extern struct io_buffer * iob_concatenate ( struct list_head *list );