Date: Fri, 8 Oct 2021 14:37:12 +0200 From: Arnd Bergmann <arnd@...db.de> To: musl@...ts.openwall.com Cc: Arnd Bergmann <arnd@...db.de>, Michael Forney <mforney@...rney.org>, ALSA Development Mailing List <alsa-devel@...a-project.org>, Takashi Iwai <tiwai@...e.com>, Baolin Wang <baolin.wang@...aro.org>, y2038 Mailman List <y2038@...ts.linaro.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Mark Brown <broonie@...nel.org>, Baolin Wang <baolin.wang7@...il.com> Subject: Re: Re: [alsa-devel] [PATCH v7 8/9] ALSA: add new 32-bit layout for snd_pcm_mmap_status/control On Fri, Oct 8, 2021 at 2:06 PM Rich Felker <dalias@...c.org> wrote: > On Fri, Oct 08, 2021 at 11:24:39AM +0200, Arnd Bergmann wrote: > > > > I've tried to understand this part of musl's convert_ioctl_struct(), but I just > > can't figure out whether it does the conversion based the on the layout that > > is currently used in the kernel, or based on the layout we should have been > > using, and would use with the above fix. Rich, can you help me here? > > If the attempted 64-bit ioctl is missing (ENOTTY), it does the > conversion to the legacy 32-bit one and retries with that, then > converts the results back to the 64-bit form. I understand that it tries to do that. The part that I'm not sure about is which of the two possible 64-bit forms it's using -- the broken one we have defined in the kernel headers, or the one we were trying to define but failed. Arnd
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