3473 			  unsigned int to, struct skb_seq_state *st)  in skb_prepare_seq_read()  argument
3475 	st->lower_offset = from;  in skb_prepare_seq_read()
3476 	st->upper_offset = to;  in skb_prepare_seq_read()
3477 	st->root_skb = st->cur_skb = skb;  in skb_prepare_seq_read()
3478 	st->frag_idx = st->stepped_offset = 0;  in skb_prepare_seq_read()
3479 	st->frag_data = NULL;  in skb_prepare_seq_read()
3509 			  struct skb_seq_state *st)  in skb_seq_read()  argument
3511 	unsigned int block_limit, abs_offset = consumed + st->lower_offset;  in skb_seq_read()
3514 	if (unlikely(abs_offset >= st->upper_offset)) {  in skb_seq_read()
3515 		if (st->frag_data) {  in skb_seq_read()
3516 			kunmap_atomic(st->frag_data);  in skb_seq_read()
3517 			st->frag_data = NULL;  in skb_seq_read()
3523 	block_limit = skb_headlen(st->cur_skb) + st->stepped_offset;  in skb_seq_read()
3525 	if (abs_offset < block_limit && !st->frag_data) {  in skb_seq_read()
3526 		*data = st->cur_skb->data + (abs_offset - st->stepped_offset);  in skb_seq_read()
3530 	if (st->frag_idx == 0 && !st->frag_data)  in skb_seq_read()
3531 		st->stepped_offset += skb_headlen(st->cur_skb);  in skb_seq_read()
3533 	while (st->frag_idx < skb_shinfo(st->cur_skb)->nr_frags) {  in skb_seq_read()
3534 		frag = &skb_shinfo(st->cur_skb)->frags[st->frag_idx];  in skb_seq_read()
3535 		block_limit = skb_frag_size(frag) + st->stepped_offset;  in skb_seq_read()
3538 			if (!st->frag_data)  in skb_seq_read()
3539 				st->frag_data = kmap_atomic(skb_frag_page(frag));  in skb_seq_read()
3541 			*data = (u8 *) st->frag_data + skb_frag_off(frag) +  in skb_seq_read()
3542 				(abs_offset - st->stepped_offset);  in skb_seq_read()
3547 		if (st->frag_data) {  in skb_seq_read()
3548 			kunmap_atomic(st->frag_data);  in skb_seq_read()
3549 			st->frag_data = NULL;  in skb_seq_read()
3552 		st->frag_idx++;  in skb_seq_read()
3553 		st->stepped_offset += skb_frag_size(frag);  in skb_seq_read()
3556 	if (st->frag_data) {  in skb_seq_read()
3557 		kunmap_atomic(st->frag_data);  in skb_seq_read()
3558 		st->frag_data = NULL;  in skb_seq_read()
3561 	if (st->root_skb == st->cur_skb && skb_has_frag_list(st->root_skb)) {  in skb_seq_read()
3562 		st->cur_skb = skb_shinfo(st->root_skb)->frag_list;  in skb_seq_read()
3563 		st->frag_idx = 0;  in skb_seq_read()
3565 	} else if (st->cur_skb->next) {  in skb_seq_read()
3566 		st->cur_skb = st->cur_skb->next;  in skb_seq_read()
3567 		st->frag_idx = 0;  in skb_seq_read()
3582 void skb_abort_seq_read(struct skb_seq_state *st)  in skb_abort_seq_read()  argument
3584 	if (st->frag_data)  in skb_abort_seq_read()
3585 		kunmap_atomic(st->frag_data);  in skb_abort_seq_read()