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=-1.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FAKE_REPLY_C,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, SUBJ_ALL_CAPS,USER_AGENT_SANE_1 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 04CF1C43603 for ; Thu, 12 Dec 2019 21:01:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BABBA21556 for ; Thu, 12 Dec 2019 21:00:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="jTIUzGYK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730997AbfLLVA6 (ORCPT ); Thu, 12 Dec 2019 16:00:58 -0500 Received: from mail-wr1-f65.google.com ([209.85.221.65]:34828 "EHLO mail-wr1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730779AbfLLVA6 (ORCPT ); Thu, 12 Dec 2019 16:00:58 -0500 Received: by mail-wr1-f65.google.com with SMTP id g17so4292949wro.2 for ; Thu, 12 Dec 2019 13:00:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=CHC7FV6CIEHq8S+8jI61ulqchrwWHIcBae3UB47SF/w=; b=jTIUzGYKVcMgBpicgM0ZJXDLpERq1iE3VTnCWgL/3zjWyHVs/h1IwePHVxhlJ9W3OB /Bzew4TSzuk1btfHnRJP1K3G5+7VM3/d+B5XRuhO+lUHSBZUT2GPAUKGq5eWg+x/xITE 8/6D5i1UwnLOXCMYu2WyHGvlvAX+owd1p3rczutjAMWwo3/uew2ChVuRop7Nbo8asif/ OqieWwOKGEXCY0qRaxrOYu6Rd9ypLW48HYeInyAhowUyeyXIJ/UBqfydqGXhEanlhTpT mAtpzQIuX6Px7Y3Vf98a0nBAdykFY6AMHjw/nONIIBSuLr5XC11MIT3yirXrP4OsrSSR Q7WA== 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:mime-version :content-disposition:user-agent; bh=CHC7FV6CIEHq8S+8jI61ulqchrwWHIcBae3UB47SF/w=; b=tqeUj7kth9JuSXFZzP7thRMyjjLtrV7dG9Tu3T4KhQaioYHCF1XLESFR+d5k4hlNVH SZu7mKwnBy76/eBoOQdYuvfVy9nTpP2L28PObuE2kbxZ5jqIpnYF+4aQvcCwZKWweFlt 0zhAUKF7VfuWCutA5quAZAjntotrGJLN7TLVC2E5SrXGJ34GnQKMVAT0OlnYqc4/gazm 3Eku/gzyeaIV2+F9OxNDdaUA24oGkiO0WOTcSbWzerhIiJYtW3FDnByWzT8y7bbiVlDV m5PlkoxfUccQqbAty9PqipP1TFnXK9XUK0hYOqOuJTlcCo8B6pSXv6ApqzzXp5T+EylD 9LRg== X-Gm-Message-State: APjAAAVe5ECqR26keleAm4YLAf+T4TLpvfvgNxChiNPUaIcdJXkZSprO GUWKZeEXTYbynd8Cd0TBduCkrOU= X-Google-Smtp-Source: APXvYqwysq+8lJjhJmKxq5ex+G2XRwfIKg/0HWSF+kY6sGGYu1j9kuYmyEfw04aRFS3tC3wO7K7iNw== X-Received: by 2002:adf:e6c5:: with SMTP id y5mr8304942wrm.210.1576184456181; Thu, 12 Dec 2019 13:00:56 -0800 (PST) Received: from avx2 ([46.53.254.212]) by smtp.gmail.com with ESMTPSA id m7sm7484135wma.39.2019.12.12.13.00.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Dec 2019 13:00:55 -0800 (PST) Date: Fri, 13 Dec 2019 00:00:52 +0300 From: Alexey Dobriyan To: peterz@infradead.org Cc: linux-kernel@vger.kernel.org Subject: Re: READ_ONCE() + STACKPROTECTOR_STRONG == :/ Message-ID: <20191212210052.GA8906@avx2> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > We could move the kernel to C++ and write: > > std::remove_volatile::type __p = (p); > > /me runs like hell... Did you just said I can send "struct sched_domain::private" and "struct wait_queue_entry::private" rename? :^) Doable but not until C++20. constinit and designated initializers are pretty mandatory. Debian GNU/Linux 8 debian88 ttyS0 debian88 login: root Password: Last login: Thu Sep 19 01:04:29 +03 2019 on tty1 Linux debian88 5.3.0+ #1 SMP PREEMPT Thu Sep 19 01:02:26 +03 2019 x86_64 root@debian88:~# cat /proc/$(pgrep sshd)/stack [<0>] _ZL9do_selectiP11fd_set_bitsP10timespec64+0x5ac/0x750 [<0>] _Z15core_sys_selectiP15__kernel_fd_setS0_S0_P10timespec64+0x143/0x260 [<0>] __x64_sys_select+0xa7/0xf0 [<0>] do_syscall_64+0x3b/0xe7 [<0>] entry_SYSCALL_64_after_hwframe+0x44/0xa9