From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 54F4BC04EBF for ; Tue, 4 Dec 2018 01:53:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1BC4920850 for ; Tue, 4 Dec 2018 01:53:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="PIfw1Yd3" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1BC4920850 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=grimberg.me Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726057AbeLDBwV (ORCPT ); Mon, 3 Dec 2018 20:52:21 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:39014 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725988AbeLDBwU (ORCPT ); Mon, 3 Dec 2018 20:52:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=bYaZ4qlIQDKGcnjv76hOkv1dLfD9fJnppYA9pfY+0qE=; b=PIfw1Yd3X082vcelUypqH2guP KW0XRCxacAWM4x3VNb4O88mK2i90/uc7xr/MhZaxrioUYj5jJ5RFXSAmTlernvL3cAgYrQJWlsTix 2VMOiaApx00EnVRYabve5OnRldxF6dHd+xv95qNPJsm+Ku+VDEgMLkiYP7Pts99Ubo3oyzGYh8WLg Gdnh1sMSjjATS5vMuFHC8+SvyUNhX53RyQCPnTm0BXrbElBmJaFusGIffbpnQAxxn5WrD5FKRrcQS nwYHXA4HVmrqzN/unK76lHSRLqqg0Eloh94PUT0HUOGETZC7qfLd8qIqP4ABjVGsS4DtXywbLEdN+ 0QIAfxKqw==; Received: from [2600:1700:65a0:78e0:514:7862:1503:8e4d] (helo=sagi-Latitude-E7470.lbits) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1gTzsq-0003Zq-0l; Tue, 04 Dec 2018 01:52:20 +0000 From: Sagi Grimberg To: linux-nvme@lists.infradead.org Cc: linux-block@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Christoph Hellwig , Keith Busch , "David S. Miller" Subject: [PATCH v5 02/13] datagram: open-code copy_page_to_iter Date: Mon, 3 Dec 2018 17:52:06 -0800 Message-Id: <20181204015217.16613-3-sagi@grimberg.me> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181204015217.16613-1-sagi@grimberg.me> References: <20181204015217.16613-1-sagi@grimberg.me> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sagi Grimberg This will be useful to consolidate skb_copy_and_hash_datagram_iter and skb_copy_and_csum_datagram to a single code path. Acked-by: David S. Miller Signed-off-by: Sagi Grimberg --- net/core/datagram.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/net/core/datagram.c b/net/core/datagram.c index 57f3a6fcfc1e..abe642181b64 100644 --- a/net/core/datagram.c +++ b/net/core/datagram.c @@ -445,11 +445,14 @@ int skb_copy_datagram_iter(const struct sk_buff *skb, int offset, end = start + skb_frag_size(frag); if ((copy = end - offset) > 0) { + struct page *page = skb_frag_page(frag); + u8 *vaddr = kmap(page); + if (copy > len) copy = len; - n = copy_page_to_iter(skb_frag_page(frag), - frag->page_offset + offset - - start, copy, to); + n = copy_to_iter(vaddr + frag->page_offset + + offset - start, copy, to); + kunmap(page); offset += n; if (n != copy) goto short_copy; -- 2.17.1