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=-6.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 20572C433E2 for ; Tue, 15 Sep 2020 16:19:31 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8A6942068D for ; Tue, 15 Sep 2020 16:19:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8A6942068D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ubuntu.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4BrT2S2lWSzDqTT for ; Wed, 16 Sep 2020 02:19:28 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=ubuntu.com (client-ip=91.189.89.112; helo=youngberry.canonical.com; envelope-from=christian.brauner@ubuntu.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ubuntu.com Received: from youngberry.canonical.com (youngberry.canonical.com [91.189.89.112]) by lists.ozlabs.org (Postfix) with ESMTP id 4BrSpN3RgszDqNL for ; Wed, 16 Sep 2020 02:09:00 +1000 (AEST) Received: from ip5f5af089.dynamic.kabel-deutschland.de ([95.90.240.137] helo=wittgenstein) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1kIDVY-0006rA-V3; Tue, 15 Sep 2020 16:08:41 +0000 Date: Tue, 15 Sep 2020 18:08:40 +0200 From: Christian Brauner To: Kees Cook Subject: Re: [PATCH 10/15] selftests/seccomp: Avoid redundant register flushes Message-ID: <20200915160840.6ybm67gowqeqyms2@wittgenstein> References: <20200912110820.597135-1-keescook@chromium.org> <20200912110820.597135-11-keescook@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200912110820.597135-11-keescook@chromium.org> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thadeu Lima de Souza Cascardo , Will Drewry , linux-xtensa@linux-xtensa.org, linux-kernel@vger.kernel.org, Andy Lutomirski , Max Filippov , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Christian Brauner Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Sat, Sep 12, 2020 at 04:08:15AM -0700, Kees Cook wrote: > When none of the registers have changed, don't flush them back. This can > happen if the architecture uses a non-register way to change the syscall > (e.g. arm64) , and a return value hasn't been written. > > Signed-off-by: Kees Cook > --- Looks good! Acked-by: Christian Brauner