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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DF2F1C433EF for ; Sat, 7 May 2022 02:52:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1445386AbiEGC4c (ORCPT ); Fri, 6 May 2022 22:56:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49178 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230141AbiEGC43 (ORCPT ); Fri, 6 May 2022 22:56:29 -0400 Received: from mail-yb1-xb35.google.com (mail-yb1-xb35.google.com [IPv6:2607:f8b0:4864:20::b35]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9B8F84C437 for ; Fri, 6 May 2022 19:52:44 -0700 (PDT) Received: by mail-yb1-xb35.google.com with SMTP id v59so15820573ybi.12 for ; Fri, 06 May 2022 19:52:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=P+aARka73pRNnVNet6HMvyJ5k9mv+3Ksu4uD0/m64JI=; b=ObPyXsqhZxsJyWR/3aHiwynl3EvkJvHyGBerKuqh54qM4RAN0XJpUjDRfp+VfCENEs fe5bYRiZ8LqlN1lOHPk1AFtFddf6qnGgyGuDstUnXEx7RhiTiYM8V8pjlrZLLx7l3mUG dmkyQp7PYaheos4zcn8lnjOYWAVuaTc8gIyTXx2Fd32A2wk3jSgAlX0Cn2oYCzmNzprW wchksqmsvI9ODk4suohMe+lg8g/1BYUhzCJhZI5cLZaXmWApXiHA1EPLJn7bX8jsFDHy PHfv4SY9YW8OHVxsp5aHQsN+U57g9Mp7+g0dBOPjq60n/b3t7lFJ/RP613kGniRE1L/d Z3Vg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=P+aARka73pRNnVNet6HMvyJ5k9mv+3Ksu4uD0/m64JI=; b=LJrQuy/wXhDmmWIqd2xL4QOnPBKHhVu8HCxdUMoMZ2okSlIVEcWvvdONGUI7xwMiBE MuFNAt5RDR1c6SwCRKzoagyWBpNsAmIKnSfe3dvxwvGxaHOLjSJFgaPjYnQHBW+/kFLW LJCRuPmvoBcXQ7SdlTO+m4jD7enWzKm7qGdVxXcuA9myNSW9pyYrz0Qrij6ev5Z9UPne 3rj6z0rsmb2NzlZd7qnvrqZbkyULlO2IJixq90oPclJSVL0+fLKsvS0NvR/6AHgu1csb l2dFusiKzsXwle85MteT2apkTxzVOOUMpKOcPwMKf628+Ol/yMatxgKuJ7tzyWXbFhhl QDDA== X-Gm-Message-State: AOAM530QsYFrxO55KnT49A8CGLTtq2lPp1xz6nk55o7xaOOCGuDOvDo2 /aKeyRlQsdgpRZWbbwjZXxkNaKqkmsFq/AVr8kQ= X-Google-Smtp-Source: ABdhPJw2INUOB6juaUMKyWUPyj9rL+kosM0PPkRV6xLOPcJXqH2dMkRr1kR+wpaObnfU1Z1F3QhlSZ233MaJVhTZBPY= X-Received: by 2002:a25:b991:0:b0:610:bf4e:1b33 with SMTP id r17-20020a25b991000000b00610bf4e1b33mr5083905ybg.352.1651891963895; Fri, 06 May 2022 19:52:43 -0700 (PDT) MIME-Version: 1.0 References: <20220506121431.563656641@infradead.org> <20220506121631.365070674@infradead.org> In-Reply-To: <20220506121631.365070674@infradead.org> From: Lai Jiangshan Date: Sat, 7 May 2022 10:52:32 +0800 Message-ID: Subject: Re: [PATCH 4/6] x86/entry: Remove skip_r11rcx To: Peter Zijlstra Cc: X86 ML , LKML , Josh Poimboeuf , Brian Gerst , Andrew Cooper , Mark Rutland Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 6, 2022 at 8:20 PM Peter Zijlstra wrote: > > Yes, r11 and rcx have been restored previously, but since we're > popping them anyway (into rsi) might as well pop them into their own > regs -- setting them to the value they already are. > > Less magical code. > > Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Lai Jiangshan