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=-7.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 710DFC433B4 for ; Mon, 5 Apr 2021 04:53:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3FEB961284 for ; Mon, 5 Apr 2021 04:53:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231230AbhDEEx0 (ORCPT ); Mon, 5 Apr 2021 00:53:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56860 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230036AbhDEExY (ORCPT ); Mon, 5 Apr 2021 00:53:24 -0400 Received: from mail-pl1-x635.google.com (mail-pl1-x635.google.com [IPv6:2607:f8b0:4864:20::635]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C77C2C061756; Sun, 4 Apr 2021 21:53:17 -0700 (PDT) Received: by mail-pl1-x635.google.com with SMTP id v8so5101319plz.10; Sun, 04 Apr 2021 21:53:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=ZCE8DXq6AXOhvGcnEbPdIGiWxGR0DNPB4En9zD417Mo=; b=AjR104ethb/rIHzSnVpqVgi6EsTCzJaaUxnLpilWzQbcoMJU/+9r0Z9QHCdn842aO9 agRr0cv9hjGTOhgosz26MQTAtZBwKLcvl0/7TkCsMnauaLGbmBS9EkD+SfteNM6H9huV c3uylhufMbXhGp6wnqw23rb6O3v4/+/gsrGBqbRHvHv40zCUbw9mTB/aT35baR6+SAUL dyiKy4friYGOoIxeN6pAwk/wVbwrvwFAwxD5B39n/Wz8aS7nvnSbmxahArC1dKFbdmUg l0aoUQxOsWkhvHwfrHeku6rWzWHCw3yr8/q4Oe6vqfCDHrEwoFPB83ECQVsc4mDQsX5r FewA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=ZCE8DXq6AXOhvGcnEbPdIGiWxGR0DNPB4En9zD417Mo=; b=ikA1T+W2VOKTTsvEZPkK567/LDTzjjNWL63PeEni9WDb8GlLA6RMUQQfES9dUgtzwm gnYynwgEQWADEZdqjJmOetzl80LeXwSQD2yx+1yZICu6RdCIKg2hKi0JonAVdXwb7GbA VPXNKHkx0erbRHD0BjUru/eQWw6TdydLPNzXQzAdWW2fDlHBilQl0TPtYQKI9yYiVeC1 jqtYnvKsEkdRYwJaGEG2tpny3wbmYPuAn0efLqRj/UKVWP5c0ad/skIhBOXQ9shrRNMX rsoVTyC874F0GHnTnDydT6THKytkYdypipmP9+jz2fUn/HVm82BgXASzwZEf+j4VkhhP uB6w== X-Gm-Message-State: AOAM531KqV/flUv0eWyboh/2iAFRI7EMfJb/dpsBOXwM545TUcOkffes Zt4OUeJwghrEPSJqrUIYlV8kEfH5CSsOUg== X-Google-Smtp-Source: ABdhPJzfg2ojOFwwEAtuSC96RYvGRpvmKRNH0XexWPQ2Qhe5nU1HK9MGimRyUq/fHwj0Fqunx6onqA== X-Received: by 2002:a17:90a:a108:: with SMTP id s8mr24898984pjp.199.1617598397085; Sun, 04 Apr 2021 21:53:17 -0700 (PDT) Received: from gmail.com ([2601:600:8500:5f14:d627:c51e:516e:a105]) by smtp.gmail.com with ESMTPSA id gm10sm14102358pjb.4.2021.04.04.21.53.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 04 Apr 2021 21:53:16 -0700 (PDT) Date: Sun, 4 Apr 2021 21:50:50 -0700 From: Andrei Vagin To: Christophe Leroy Cc: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, dima@arista.com, arnd@arndb.de, tglx@linutronix.de, vincenzo.frascino@arm.com, luto@kernel.org, linux-arch@vger.kernel.org Subject: Re: [PATCH RESEND v1 4/4] powerpc/vdso: Add support for time namespaces Message-ID: References: <1a15495f80ec19a87b16cf874dbf7c3fa5ec40fe.1617209142.git.christophe.leroy@csgroup.eu> MIME-Version: 1.0 Content-Type: text/plain; charset=koi8-r Content-Disposition: inline In-Reply-To: <1a15495f80ec19a87b16cf874dbf7c3fa5ec40fe.1617209142.git.christophe.leroy@csgroup.eu> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 31, 2021 at 04:48:47PM +0000, Christophe Leroy wrote: > This patch adds the necessary glue to provide time namespaces. > > Things are mainly copied from ARM64. > > __arch_get_timens_vdso_data() calculates timens vdso data position > based on the vdso data position, knowing it is the next page in vvar. > This avoids having to redo the mflr/bcl/mflr/mtlr dance to locate > the page relative to running code position. > Acked-by: Andrei Vagin > Signed-off-by: Christophe Leroy