diff options
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/xdr.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c index 336a7c7833e4..f7767bf22406 100644 --- a/net/sunrpc/xdr.c +++ b/net/sunrpc/xdr.c @@ -1224,30 +1224,34 @@ EXPORT_SYMBOL(xdr_restrict_buflen); /** * xdr_write_pages - Insert a list of pages into an XDR buffer for sending * @xdr: pointer to xdr_stream - * @pages: list of pages - * @base: offset of first byte - * @len: length of data in bytes + * @pages: array of pages to insert + * @base: starting offset of first data byte in @pages + * @len: number of data bytes in @pages to insert * + * After the @pages are added, the tail iovec is instantiated pointing to + * end of the head buffer, and the stream is set up to encode subsequent + * items into the tail. */ void xdr_write_pages(struct xdr_stream *xdr, struct page **pages, unsigned int base, unsigned int len) { struct xdr_buf *buf = xdr->buf; - struct kvec *iov = buf->tail; + struct kvec *tail = buf->tail; + buf->pages = pages; buf->page_base = base; buf->page_len = len; - iov->iov_base = (char *)xdr->p; - iov->iov_len = 0; - xdr->iov = iov; + tail->iov_base = xdr->p; + tail->iov_len = 0; + xdr->iov = tail; if (len & 3) { unsigned int pad = 4 - (len & 3); BUG_ON(xdr->p >= xdr->end); - iov->iov_base = (char *)xdr->p + (len & 3); - iov->iov_len += pad; + tail->iov_base = (char *)xdr->p + (len & 3); + tail->iov_len += pad; len += pad; *xdr->p++ = 0; } |