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[209.132.180.67]) by mx.google.com with ESMTP id f11-v6si928886plm.19.2018.03.14.18.48.17; Wed, 14 Mar 2018 18:48:32 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=N062A2Mm; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751694AbeCOBr0 (ORCPT + 99 others); Wed, 14 Mar 2018 21:47:26 -0400 Received: from mail-qk0-f194.google.com ([209.85.220.194]:42012 "EHLO mail-qk0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751405AbeCOBrZ (ORCPT ); Wed, 14 Mar 2018 21:47:25 -0400 Received: by mail-qk0-f194.google.com with SMTP id b198so5705487qkg.9; Wed, 14 Mar 2018 18:47:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=f2PTmz2/UHmcGntexP9HW2ksYXpT4OhsPL6H6NBZnEw=; b=N062A2Mmd+4fj1D/h41G/7Gek3XLgQbjnG3uHUe21q9mjDwfNUnz8tsTVxRDS5SSD9 2HUzVx7CkbZkmtlPr2JFc72VKSPyk1ctA/OMsQJZZLKewAgHEeTkStvXBstktP/DOXS+ KyYw3p80eZim7/h2juQnJJYd2zibs76AbZQoozdtQh31xtrn7VxGXt+fCYAbZriy+TM5 A9pXh4Go8/WdVr6Kzri1+S+rBAd2Q4DPLXppdXTFRsDCg0IqCMKmQykbmXEXolmummLb K0pu3KAxvyIdI2WGwX509OqR3TMPTRUKdu4Ul7cJOGIYyAmx0mVgfjj6MQm1g7MqkRwI QkyQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=f2PTmz2/UHmcGntexP9HW2ksYXpT4OhsPL6H6NBZnEw=; b=avJ3jari2i52gKHcUBSdbYTeGVyX7J1MZbY5frYuZZL2nthnmn2r2dt1pqn6DfvqH+ IESiYwqIwAKzlD4VdF8P9U2dBPTRYryPgIXgJdWScBk1UhavE1saTqZHPIOZgV5jMGhl kKEZUK9uUgskEedwtOMf2SmICfG4sKp3K6BhVKYV/j7PSMSTOeJ0uZOLajBuxWFaXQF7 M+DbGvmqhsFlai9JaK4xmkSqVYgurrGIAu+T5l3ZcKdULMnmIw5aGs1s0t5ReUBU73Dg fVxae5MjYYf1gNiy1mcmP+muZg6dacnlDgfPoVp1CW8W6esht/qw5ROJEQx93eZx9eCg nfiA== X-Gm-Message-State: AElRT7F43FkArPl9E58M9Vz7o1jZwf7t72U6/Imay8Ly4aVfRVUUEiCc 7CYGhnKbhRoAlURFFPGC9JV4oR3QTj5E6ugJllU= X-Received: by 10.55.173.7 with SMTP id f7mr9950111qkm.195.1521078444164; Wed, 14 Mar 2018 18:47:24 -0700 (PDT) MIME-Version: 1.0 Received: by 10.140.89.138 with HTTP; Wed, 14 Mar 2018 18:47:23 -0700 (PDT) In-Reply-To: <1520997629-17361-2-git-send-email-okaya@codeaurora.org> References: <1520997629-17361-1-git-send-email-okaya@codeaurora.org> <1520997629-17361-2-git-send-email-okaya@codeaurora.org> From: Alexander Duyck Date: Wed, 14 Mar 2018 18:47:23 -0700 Message-ID: Subject: Re: [PATCH 2/7] ixgbe: eliminate duplicate barriers on weakly-ordered archs To: Sinan Kaya Cc: Netdev , Timur Tabi , sulrich@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Jeff Kirsher , intel-wired-lan , LKML Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 13, 2018 at 8:20 PM, Sinan Kaya wrote: > Code includes wmb() followed by writel() in multiple places. writel() > already has a barrier on some architectures like arm64. > > This ends up CPU observing two barriers back to back before executing the > register write. > > Since code already has an explicit barrier call, changing writel() to > writel_relaxed(). > > Signed-off-by: Sinan Kaya In this patch you missed the writel at the end of ixgbe_tx_map.