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=-5.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 3F7E8C43603 for ; Tue, 17 Dec 2019 10:43:03 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (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 4CCB62082E for ; Tue, 17 Dec 2019 10:43:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="UOUZFOOc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4CCB62082E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 676B582A; Tue, 17 Dec 2019 11:42:09 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 676B582A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1576579379; bh=bMHVQgKfJHyuQKph0aWt93xeGcXipgy13t9uWvrJC5A=; h=Date:From:To:In-Reply-To:References:Cc:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=UOUZFOOcV4lsdoArZaD53x2kb8BJ3RWDBocHvnNrHCHsBqMTwwk2je/n/HgwhKx9G hs6Bkgp0OaAy9fUKa3QB+5h2lTWU8M9sM+YiR51Tjcm7wsCvy4MMwYnwSevZNd64+T QVRPo1fiz7TVlggmkPQiJsmT0cp+cj78Qi3Kgzck= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id E1C20F80218; Tue, 17 Dec 2019 11:42:08 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id B04E3F80234; Tue, 17 Dec 2019 11:42:07 +0100 (CET) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 796F8F8020B for ; Tue, 17 Dec 2019 11:42:04 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 796F8F8020B X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 9C7ECAF79; Tue, 17 Dec 2019 10:42:03 +0000 (UTC) Date: Tue, 17 Dec 2019 11:42:03 +0100 Message-ID: From: Takashi Iwai To: Arnd Bergmann In-Reply-To: <20191211212025.1981822-1-arnd@arndb.de> References: <20191211212025.1981822-1-arnd@arndb.de> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 Emacs/25.3 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Cc: alsa-devel@alsa-project.org, y2038@lists.linaro.org, linux-kernel@vger.kernel.org, Takashi Iwai , Mark Brown , Baolin Wang Subject: Re: [alsa-devel] [PATCH v7 0/8] Fix year 2038 issue for sound subsystem X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" On Wed, 11 Dec 2019 22:20:16 +0100, Arnd Bergmann wrote: > > This is a series I worked on with Baolin in 2017 and 2018, but we > never quite managed to finish up the last pieces. During the > ALSA developer meetup at ELC-E 2018 in Edinburgh, a decision was > made to go with this approach for keeping best compatibility > with existing source code, and then I failed to follow up by > resending the patches. > > Now I have patches for all remaining time_t uses in the kernel, > so it's absolutely time to revisit them. I have done more > review of the patches myself and found a couple of minor issues > that I have fixed up, otherwise the series is still the same as > before. > > Conceptually, the idea of these patches is: > > - 64-bit applications should see no changes at all, neither > compile-time nor run-time. > > - 32-bit code compiled with a 64-bit time_t currently > does not work with ALSA, and requires kernel changes and/or > sound/asound.h changes > > - Most 32-bit code using these interfaces will work correctly > on a modified kernel, with or without the uapi header changes. > > - 32-bit code using SNDRV_TIMER_IOCTL_TREAD requires the > updated header file for 64-bit time_t support > > - 32-bit i386 user space with 64-bit time_t is broken for > SNDRV_PCM_IOCTL_STATUS, SNDRV_RAWMIDI_IOCTL_STATUS and > SNDRV_PCM_IOCTL_SYNC_PTR because of i386 alignment. This is also > addressed by the updated uapi header. > > - PCM mmap is currently supported on native x86 kernels > (both 32-bit and 64-bit) but not for compat mode. This series breaks > the 32-bit native mmap support for 32-bit time_t, but instead allows > it for 64-bit time_t on both native and compat kernels. This seems to > be the best trade-off, as mmap support is optional already, and most > 32-bit code runs in compat mode anyway. > > - I've tried to avoid breaking compilation of 32-bit code > as much as possible. Anything that does break however is likely code > that is already broken on 64-bit time_t and needs source changes to > fix them. > > I hope I addressed all review comments by now, so please pull this > for linux-5.6. > > A git branch with the same contents is available for testing at [1]. > > Arnd I see no issue other than the timer API patch Ben pointed. Could you resubmit that patch? Or just submit the whole as v8, I don't mind either way. Then we'll get this done for 5.6. Thanks! Takashi > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git y2038-alsa-v7 > [2] https://lore.kernel.org/lkml/CAK8P3a2Os66+iwQYf97qh05W2JP8rmWao8zmKoHiXqVHvyYAJA@mail.gmail.com/T/#m6519cb07cfda08adf1dedea6596bb98892b4d5dc > > Changes since v6: (Arnd): > - Add a patch to update the API versions > - Hide a timespec reference in #ifndef __KERNEL__ to remove the > last reference to time_t > - Use a more readable way to do padding and describe it in the > changelog > - Rebase to linux-5.5-rc1, changing include/sound/soc-component.h > and sound/drivers/aloop.c as needed. > > Changes since v5 (Arnd): > - Rebased to linux-5.4-rc4 > - Updated to completely remove timespec and time_t references from alsa > - found and fixed a few bugs > > Changes since v4 (Baolin): > - Add patch 5 to change trigger_tstamp member of struct snd_pcm_runtime. > - Add patch 8 to change internal timespec. > - Add more explanation in commit message. > - Use ktime_get_real_ts64() in patch 6. > - Split common code out into a separate function in patch 6. > - Fix tu->tread bug in patch 6 and remove #if __BITS_PER_LONG == 64 macro. > > Changes since v3: > - Move struct snd_pcm_status32 to pcm.h file. > - Modify comments and commit message. > - Add new patch2 ~ patch6. > > Changes since v2: > - Renamed all structures to make clear. > - Remove CONFIG_X86_X32 macro and introduced new compat_snd_pcm_status64_x86_32. > > Changes since v1: > - Add one macro for struct snd_pcm_status_32 which only active in 32bits kernel. > - Convert pcm_compat.c to use struct snd_pcm_status_64. > - Convert pcm_native.c to use struct snd_pcm_status_64. > --- > > Arnd Bergmann (3): > ALSA: move snd_pcm_ioctl_sync_ptr_compat into pcm_native.c > ALSA: add new 32-bit layout for snd_pcm_mmap_status/control > ALSA: bump uapi version numbers > > Baolin Wang (6): > ALSA: Replace timespec with timespec64 > ALSA: Avoid using timespec for struct snd_timer_status > ALSA: Avoid using timespec for struct snd_ctl_elem_value > ALSA: Avoid using timespec for struct snd_pcm_status > ALSA: Avoid using timespec for struct snd_rawmidi_status > ALSA: Avoid using timespec for struct snd_timer_tread > > include/sound/pcm.h | 74 ++++++-- > include/sound/soc-component.h | 4 +- > include/sound/timer.h | 4 +- > include/uapi/sound/asound.h | 145 +++++++++++++-- > sound/core/pcm.c | 12 +- > sound/core/pcm_compat.c | 282 ++++++++---------------------- > sound/core/pcm_lib.c | 38 ++-- > sound/core/pcm_native.c | 226 +++++++++++++++++++++--- > sound/core/rawmidi.c | 132 +++++++++++--- > sound/core/rawmidi_compat.c | 87 +++------ > sound/core/timer.c | 229 ++++++++++++++++++------ > sound/core/timer_compat.c | 62 +------ > sound/drivers/aloop.c | 2 +- > sound/pci/hda/hda_controller.c | 10 +- > sound/soc/intel/skylake/skl-pcm.c | 4 +- > 15 files changed, 817 insertions(+), 494 deletions(-) > > -- > 2.20.0 > _______________________________________________ Alsa-devel mailing list Alsa-devel@alsa-project.org https://mailman.alsa-project.org/mailman/listinfo/alsa-devel