151 	const struct kvec *tail = xdr->tail;  in xdr_buf_to_bvec()  local
176 	if (tail->iov_len) {  in xdr_buf_to_bvec()
177 		bvec_set_virt(bvec, tail->iov_base, tail->iov_len);  in xdr_buf_to_bvec()
204 	struct kvec *tail = xdr->tail;  in xdr_inline_pages()  local
214 	tail->iov_base = buf + offset;  in xdr_inline_pages()
215 	tail->iov_len = buflen - offset;  in xdr_inline_pages()
474 		xdr_buf_iov_zero(buf->tail, pgbase - buf->page_len, len);  in xdr_buf_pages_zero()
478 		xdr_buf_iov_zero(buf->tail, 0, pgbase + len - buf->page_len);  in xdr_buf_pages_zero()
534 	struct kvec *tail = buf->tail;  in xdr_buf_try_expand()  local
535 	unsigned int sum = head->iov_len + buf->page_len + tail->iov_len;  in xdr_buf_try_expand()
550 		/* Expand the tail buffer */  in xdr_buf_try_expand()
552 		tail->iov_len += free_space;  in xdr_buf_try_expand()
561 	const struct kvec *tail = buf->tail;  in xdr_buf_tail_copy_right()  local
564 	if (to >= tail->iov_len)  in xdr_buf_tail_copy_right()
566 	if (len + to > tail->iov_len)  in xdr_buf_tail_copy_right()
567 		len = tail->iov_len - to;  in xdr_buf_tail_copy_right()
568 	memmove(tail->iov_base + to, tail->iov_base + base, len);  in xdr_buf_tail_copy_right()
575 	const struct kvec *tail = buf->tail;  in xdr_buf_pages_copy_right()  local
586 		if (tail->iov_len >= len + tato)  in xdr_buf_pages_copy_right()
588 		else if (tail->iov_len > tato)  in xdr_buf_pages_copy_right()
589 			talen = tail->iov_len - tato;  in xdr_buf_pages_copy_right()
593 		if (talen > tail->iov_len)  in xdr_buf_pages_copy_right()
594 			talen = tail->iov_len;  in xdr_buf_pages_copy_right()
598 	_copy_from_pages(tail->iov_base + tato, buf->pages,  in xdr_buf_pages_copy_right()
609 	const struct kvec *tail = buf->tail;  in xdr_buf_head_copy_right()  local
638 	if (talen + tato > tail->iov_len)  in xdr_buf_head_copy_right()
639 		talen = tail->iov_len > tato ? tail->iov_len - tato : 0;  in xdr_buf_head_copy_right()
640 	memcpy(tail->iov_base + tato, head->iov_base + base, talen);  in xdr_buf_head_copy_right()
655 	const struct kvec *tail = buf->tail;  in xdr_buf_tail_shift_right()  local
657 	if (base >= tail->iov_len || !shift || !len)  in xdr_buf_tail_shift_right()
700 	const struct kvec *tail = buf->tail;  in xdr_buf_tail_copy_left()  local
702 	if (base >= tail->iov_len)  in xdr_buf_tail_copy_left()
704 	if (len > tail->iov_len - base)  in xdr_buf_tail_copy_left()
705 		len = tail->iov_len - base;  in xdr_buf_tail_copy_left()
718 		memcpy(head->iov_base + hdto, tail->iov_base + base, hdlen);  in xdr_buf_tail_copy_left()
732 			       tail->iov_base + base, pglen);  in xdr_buf_tail_copy_left()
738 	memmove(tail->iov_base + base - shift, tail->iov_base + base, len);  in xdr_buf_tail_copy_left()
835  * moved into the inlined pages and/or the tail.
863  * The extra data is not lost, but is instead moved into buf->tail.
941 	int scratch_len = buf->buflen - buf->page_len - buf->tail[0].iov_len;  in xdr_init_encode()
1149  * head, tail, and page lengths are adjusted to correspond.
1158  * simple case of truncating from one position in the tail to another.
1165 	struct kvec *tail = buf->tail;  in xdr_truncate_encode()  local
1175 	fraglen = min_t(int, buf->len - len, tail->iov_len);  in xdr_truncate_encode()
1176 	tail->iov_len -= fraglen;  in xdr_truncate_encode()
1178 	if (tail->iov_len) {  in xdr_truncate_encode()
1179 		xdr->p = tail->iov_base + tail->iov_len;  in xdr_truncate_encode()
1262  * After the @pages are added, the tail iovec is instantiated pointing to
1264  * items into the tail.
1270 	struct kvec *tail = buf->tail;  in xdr_write_pages()  local
1276 	tail->iov_base = xdr->p;  in xdr_write_pages()
1277 	tail->iov_len = 0;  in xdr_write_pages()
1278 	xdr->iov = tail;  in xdr_write_pages()
1284 		tail->iov_base = (char *)xdr->p + (len & 3);  in xdr_write_pages()
1285 		tail->iov_len += pad;  in xdr_write_pages()
1314 	return xdr_set_iov(xdr, buf->tail, base, len);  in xdr_set_tail_base()
1412 		xdr_set_iov(xdr, buf->tail, 0, buf->len);  in xdr_init_decode()
1549 		/* Truncate page data and move it into the tail */  in xdr_align_pages()
1563  * bytes is moved into the XDR tail[]. The xdr_stream current position is
1564  * then advanced past that data to align to the next XDR object in the tail.
1591  * @len bytes. When shrinking, any extra data is moved into buf->tail, whereas
1592  * when growing any data beyond the current pointer is moved into the tail.
1622  * bytes is moved into the XDR tail[]. The current pointer is then
1629 	 * Position current pointer at beginning of tail, and  in xdr_enter_page()
1642 	buf->tail[0] = empty_iov;  in xdr_buf_from_iov()
1692 	if (base < buf->tail[0].iov_len) {  in xdr_buf_subsegment()
1693 		subbuf->tail[0].iov_base = buf->tail[0].iov_base + base;  in xdr_buf_subsegment()
1694 		subbuf->tail[0].iov_len = min_t(unsigned int, len,  in xdr_buf_subsegment()
1695 						buf->tail[0].iov_len - base);  in xdr_buf_subsegment()
1696 		len -= subbuf->tail[0].iov_len;  in xdr_buf_subsegment()
1699 		base -= buf->tail[0].iov_len;  in xdr_buf_subsegment()
1700 		subbuf->tail[0].iov_base = buf->tail[0].iov_base;  in xdr_buf_subsegment()
1701 		subbuf->tail[0].iov_len = 0;  in xdr_buf_subsegment()
1805 	if (buf.tail[0].iov_len)  in xdr_stream_zero()
1806 		xdr_buf_iov_zero(buf.tail, 0, buf.tail[0].iov_len);  in xdr_stream_zero()
1826 	if (buf->tail[0].iov_len) {  in xdr_buf_trim()
1827 		cur = min_t(size_t, buf->tail[0].iov_len, trim);  in xdr_buf_trim()
1828 		buf->tail[0].iov_len -= cur;  in xdr_buf_trim()
1865 	this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);  in __read_bytes_from_xdr_buf()
1866 	memcpy(obj, subbuf->tail[0].iov_base, this_len);  in __read_bytes_from_xdr_buf()
1897 	this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);  in __write_bytes_to_xdr_buf()
1898 	memcpy(subbuf->tail[0].iov_base, obj, this_len);  in __write_bytes_to_xdr_buf()
2093 		base = buf->page_len;  /* align to start of tail */  in xdr_xcode_array2()
2096 	/* process tail */  in xdr_xcode_array2()
2099 		c = buf->tail->iov_base + base;  in xdr_xcode_array2()
2145 	    buf->head->iov_len + buf->page_len + buf->tail->iov_len)  in xdr_encode_array2()
2204 	if (offset < buf->tail[0].iov_len) {  in xdr_process_buf()
2205 		thislen = buf->tail[0].iov_len - offset;  in xdr_process_buf()
2208 		sg_set_buf(sg, buf->tail[0].iov_base + offset, thislen);  in xdr_process_buf()