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[23.128.96.18]) by mx.google.com with ESMTP id on24si787713ejb.133.2020.10.05.17.05.38; Mon, 05 Oct 2020 17:06:01 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=BS6SH4Xj; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 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 S1725977AbgJEXKv (ORCPT + 99 others); Mon, 5 Oct 2020 19:10:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35334 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725846AbgJEXKv (ORCPT ); Mon, 5 Oct 2020 19:10:51 -0400 Received: from mail-il1-x144.google.com (mail-il1-x144.google.com [IPv6:2607:f8b0:4864:20::144]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EDB7FC0613CE for ; Mon, 5 Oct 2020 16:10:50 -0700 (PDT) Received: by mail-il1-x144.google.com with SMTP id q1so9375389ilt.6 for ; Mon, 05 Oct 2020 16:10:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=I+19In+AF8vbe5roNkvtzXIzPIKxxJmAyqKvRnxYHxg=; b=BS6SH4XjD2E9BeMtV9Ry2peuJIXCcVp+SN4ASVt01msa0PaugSkbAwCspmEfvCmJKA 6sC3wb5pIZFqhpAMtCaWe3siCscKGSI+iF8xTxKYh6eplHGmlYLnOzpB1rKk5kkJIR7y mQKmQdNJCwtMubZDEnmsEbsUmNAutr+Ox/RbL7cA/MrebykTkb+cLZ17ROha0JGOZC1M okkrKPlDmmLZoa/QstcF8VL04RXC1xCo6DWNBtu5Bq2XQwu7hjpq825VnbeDoozZbPTg VNvNyWgRF4YFufyFhRGWpcJAEqOo42v/k077GX4zdSGGnfV8IQ1nLyqiiG8OLD6KAkh4 fYpQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=I+19In+AF8vbe5roNkvtzXIzPIKxxJmAyqKvRnxYHxg=; b=Y+Tec9DRm8txydA0UxbThv4N0oIzzv4wn9qW/bRbA8cUdvMmR6O4gGlvlXauWqg8AW Xtgr88t05A2aciojP2vyBR9zWb5wLWY6lWayD5D7VFCf66fQaHIst7WDB9UjCkhWJ7YM ubx2HzFZ+EzhPaaTBlUozLn+kb6xTYEwNFUcgE/lM6E0KhnXj+XG8yAmN9qp9bhicsUn R5QVSByO5iP3/TOS21TUETEAMLmfG5oiE5T2YgSXimZj4fvhs7+4+5aSY6tp6xonU1ut 2PgRdOhnqlplZHC4C3kgoIU/Y/P9lZ6pAstuoeQt9ZSU8svp0Q/XdiElsQ7ISIO/XtKp 7aHQ== X-Gm-Message-State: AOAM531jylMsqFLobzjz+0CXk98ubjOtDh9n+iQO266LQLxp0oPQQw8u gD9m6bmEjzvzUcI4fZhrGn/pWzIjpNOFc0KPMA== X-Received: by 2002:a92:b109:: with SMTP id t9mr1270322ilh.191.1601939450075; Mon, 05 Oct 2020 16:10:50 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Brian Gerst Date: Mon, 5 Oct 2020 19:10:39 -0400 Message-ID: Subject: Re: [PATCH 0/2] Clean up x86_32 stackprotector To: Andy Lutomirski Cc: "the arch/x86 maintainers" , LKML , "Christopherson, Sean J" Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 5, 2020 at 3:30 PM Andy Lutomirski wrote: > > x86_32 stackprotector is a maintenance nightmare. Clean it up. This > disables stackprotector on x86_32 on GCC 8.1 and on all clang > versions -- I'll file a bug for the latter. This should be doable on 64-bit too. All that would need to be done is to remove the zero-base of the percpu segment (which would simplify alot of other code). -- Brian Gerst