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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 DA758C3A589 for ; Thu, 15 Aug 2019 15:06:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B728D2086C for ; Thu, 15 Aug 2019 15:06:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732367AbfHOPGb (ORCPT ); Thu, 15 Aug 2019 11:06:31 -0400 Received: from outgoing-auth-1.mit.edu ([18.9.28.11]:49182 "EHLO outgoing.mit.edu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1732079AbfHOPGb (ORCPT ); Thu, 15 Aug 2019 11:06:31 -0400 Received: from callcc.thunk.org (guestnat-104-133-8-96.corp.google.com [104.133.8.96] (may be forged)) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id x7FF5VPG012886 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 15 Aug 2019 11:05:33 -0400 Received: by callcc.thunk.org (Postfix, from userid 15806) id 80E4D4218EF; Thu, 15 Aug 2019 11:05:30 -0400 (EDT) Date: Thu, 15 Aug 2019 11:05:30 -0400 From: "Theodore Y. Ts'o" To: Arnd Bergmann Cc: "H. Peter Anvin" , David Laight , Linus Torvalds , Linux Kernel Mailing List , Thomas Gleixner , John Stultz , Alexandre Belloni , Stephen Boyd , Florian Weimer , Palmer Dabbelt , Alistair Francis , GNU C Library , Karel Zak , Lennart Poettering , OGAWA Hirofumi Subject: Re: New kernel interface for sys_tz and timewarp? Message-ID: <20190815150530.GA18727@mit.edu> Mail-Followup-To: "Theodore Y. Ts'o" , Arnd Bergmann , "H. Peter Anvin" , David Laight , Linus Torvalds , Linux Kernel Mailing List , Thomas Gleixner , John Stultz , Alexandre Belloni , Stephen Boyd , Florian Weimer , Palmer Dabbelt , Alistair Francis , GNU C Library , Karel Zak , Lennart Poettering , OGAWA Hirofumi References: <20190814000622.GB20365@mit.edu> <342565604d704b6ebaf2e9ec28d3e109@AcuMS.aculab.com> <0089C4CC-DD85-48A1-869B-A9D71852BEC7@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 On Thu, Aug 15, 2019 at 03:22:45PM +0200, Arnd Bergmann wrote: > If 64-bit Windows relies on a working EFI RTC implementation, we could > decide to leave the driver enabled on 64-bit and only disable it for > 32-bit EFI. That way, future distros would no longer have to worry about > the localtime hack, at least the ones that have dropped support for > 32-bit x86 kernels. ... and who have also dropped support for legacy (non-UEFI) 64-bit boot. Keep in mind that even for distributions which may install with UEFI by default, if people have been upgrading from (for example) Debian Jessie to Stretch to Buster, they may still be using non-UEFI boot. This might be especially true on small Linode servers (such as, for example, the one which is currently running my mail smarthost....) - Ted