182 	struct kvec *tail = xdr->tail;  in xdr_inline_pages()  local
192 	tail->iov_base = buf + offset;  in xdr_inline_pages()
193 	tail->iov_len = buflen - offset;  in xdr_inline_pages()
452 		xdr_buf_iov_zero(buf->tail, pgbase - buf->page_len, len);  in xdr_buf_pages_zero()
456 		xdr_buf_iov_zero(buf->tail, 0, pgbase + len - buf->page_len);  in xdr_buf_pages_zero()
512 	struct kvec *tail = buf->tail;  in xdr_buf_try_expand()  local
513 	unsigned int sum = head->iov_len + buf->page_len + tail->iov_len;  in xdr_buf_try_expand()
528 		/* Expand the tail buffer */  in xdr_buf_try_expand()
530 		tail->iov_len += free_space;  in xdr_buf_try_expand()
539 	const struct kvec *tail = buf->tail;  in xdr_buf_tail_copy_right()  local
542 	if (to >= tail->iov_len)  in xdr_buf_tail_copy_right()
544 	if (len + to > tail->iov_len)  in xdr_buf_tail_copy_right()
545 		len = tail->iov_len - to;  in xdr_buf_tail_copy_right()
546 	memmove(tail->iov_base + to, tail->iov_base + base, len);  in xdr_buf_tail_copy_right()
553 	const struct kvec *tail = buf->tail;  in xdr_buf_pages_copy_right()  local
564 		if (tail->iov_len >= len + tato)  in xdr_buf_pages_copy_right()
566 		else if (tail->iov_len > tato)  in xdr_buf_pages_copy_right()
567 			talen = tail->iov_len - tato;  in xdr_buf_pages_copy_right()
571 		if (talen > tail->iov_len)  in xdr_buf_pages_copy_right()
572 			talen = tail->iov_len;  in xdr_buf_pages_copy_right()
576 	_copy_from_pages(tail->iov_base + tato, buf->pages,  in xdr_buf_pages_copy_right()
587 	const struct kvec *tail = buf->tail;  in xdr_buf_head_copy_right()  local
616 	if (talen + tato > tail->iov_len)  in xdr_buf_head_copy_right()
617 		talen = tail->iov_len > tato ? tail->iov_len - tato : 0;  in xdr_buf_head_copy_right()
618 	memcpy(tail->iov_base + tato, head->iov_base + base, talen);  in xdr_buf_head_copy_right()
633 	const struct kvec *tail = buf->tail;  in xdr_buf_tail_shift_right()  local
635 	if (base >= tail->iov_len || !shift || !len)  in xdr_buf_tail_shift_right()
678 	const struct kvec *tail = buf->tail;  in xdr_buf_tail_copy_left()  local
680 	if (base >= tail->iov_len)  in xdr_buf_tail_copy_left()
682 	if (len > tail->iov_len - base)  in xdr_buf_tail_copy_left()
683 		len = tail->iov_len - base;  in xdr_buf_tail_copy_left()
696 		memcpy(head->iov_base + hdto, tail->iov_base + base, hdlen);  in xdr_buf_tail_copy_left()
710 			       tail->iov_base + base, pglen);  in xdr_buf_tail_copy_left()
716 	memmove(tail->iov_base + base - shift, tail->iov_base + base, len);  in xdr_buf_tail_copy_left()
813  * moved into the inlined pages and/or the tail.
841  * The extra data is not lost, but is instead moved into buf->tail.
926 	int scratch_len = buf->buflen - buf->page_len - buf->tail[0].iov_len;  in xdr_init_encode()
1133  * head, tail, and page lengths are adjusted to correspond.
1142  * simple case of truncating from one position in the tail to another.
1149 	struct kvec *tail = buf->tail;  in xdr_truncate_encode()  local
1159 	fraglen = min_t(int, buf->len - len, tail->iov_len);  in xdr_truncate_encode()
1160 	tail->iov_len -= fraglen;  in xdr_truncate_encode()
1162 	if (tail->iov_len) {  in xdr_truncate_encode()
1163 		xdr->p = tail->iov_base + tail->iov_len;  in xdr_truncate_encode()
1236 	struct kvec *iov = buf->tail;  in xdr_write_pages()
1279 	return xdr_set_iov(xdr, buf->tail, base, len);  in xdr_set_tail_base()
1362 		xdr_set_iov(xdr, buf->tail, 0, buf->len);  in xdr_init_decode()
1489 		/* Truncate page data and move it into the tail */  in xdr_align_pages()
1503  * bytes is moved into the XDR tail[]. The xdr_stream current position is
1504  * then advanced past that data to align to the next XDR object in the tail.
1531  * @len bytes. When shrinking, any extra data is moved into buf->tail, whereas
1532  * when growing any data beyond the current pointer is moved into the tail.
1562  * bytes is moved into the XDR tail[]. The current pointer is then
1569 	 * Position current pointer at beginning of tail, and  in xdr_enter_page()
1582 	buf->tail[0] = empty_iov;  in xdr_buf_from_iov()
1632 	if (base < buf->tail[0].iov_len) {  in xdr_buf_subsegment()
1633 		subbuf->tail[0].iov_base = buf->tail[0].iov_base + base;  in xdr_buf_subsegment()
1634 		subbuf->tail[0].iov_len = min_t(unsigned int, len,  in xdr_buf_subsegment()
1635 						buf->tail[0].iov_len - base);  in xdr_buf_subsegment()
1636 		len -= subbuf->tail[0].iov_len;  in xdr_buf_subsegment()
1639 		base -= buf->tail[0].iov_len;  in xdr_buf_subsegment()
1640 		subbuf->tail[0].iov_base = buf->tail[0].iov_base;  in xdr_buf_subsegment()
1641 		subbuf->tail[0].iov_len = 0;  in xdr_buf_subsegment()
1745 	if (buf.tail[0].iov_len)  in xdr_stream_zero()
1746 		xdr_buf_iov_zero(buf.tail, 0, buf.tail[0].iov_len);  in xdr_stream_zero()
1766 	if (buf->tail[0].iov_len) {  in xdr_buf_trim()
1767 		cur = min_t(size_t, buf->tail[0].iov_len, trim);  in xdr_buf_trim()
1768 		buf->tail[0].iov_len -= cur;  in xdr_buf_trim()
1805 	this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);  in __read_bytes_from_xdr_buf()
1806 	memcpy(obj, subbuf->tail[0].iov_base, this_len);  in __read_bytes_from_xdr_buf()
1837 	this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);  in __write_bytes_to_xdr_buf()
1838 	memcpy(subbuf->tail[0].iov_base, obj, this_len);  in __write_bytes_to_xdr_buf()
2033 		base = buf->page_len;  /* align to start of tail */  in xdr_xcode_array2()
2036 	/* process tail */  in xdr_xcode_array2()
2039 		c = buf->tail->iov_base + base;  in xdr_xcode_array2()
2085 	    buf->head->iov_len + buf->page_len + buf->tail->iov_len)  in xdr_encode_array2()
2144 	if (offset < buf->tail[0].iov_len) {  in xdr_process_buf()
2145 		thislen = buf->tail[0].iov_len - offset;  in xdr_process_buf()
2148 		sg_set_buf(sg, buf->tail[0].iov_base + offset, thislen);  in xdr_process_buf()