From mboxrd@z Thu Jan  1 00:00:00 1970
From: Kevin Easton <kevin@guarana.org>
Subject: Re: Can we drop upstream Linux x32 support?
Date: Thu, 13 Dec 2018 05:03:13 +0000
Message-ID: <20181213050313.GA21201@ip-172-31-15-78>
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To: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Andy Lutomirski <luto@kernel.org>, X86 ML <x86@kernel.org>, LKML <linux-kernel@vger.kernel.org>, Linux API <linux-api@vger.kernel.org>, "H. Peter Anvin" <hpa@zytor.com>, Peter Zijlstra <peterz@infradead.org>, Borislav Petkov <bp@alien8.de>, Florian Weimer <fweimer@redhat.com>, Mike Frysinger <vapier@gentoo.org>, "H. J. Lu" <hjl.tools@gmail.com>, Rich Felker <dalias@libc.org>, x32@buildd.debian.org, Arnd Bergmann <arnd@arndb.de>, Will Deacon <will.deacon@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Linus Torvalds <torvalds@linux-foundation.org>
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On Tue, Dec 11, 2018 at 11:29:14AM +0100, John Paul Adrian Glaubitz wrote:
...
> I can't say anything about the syscall interface. However, what I do know
> is that the weird combination of a 32-bit userland with a 64-bit kernel
> interface is sometimes causing issues. For example, application code usually
> expects things like time_t to be 32-bit on a 32-bit system. However, this
> isn't the case for x32 which is why code fails to build.

OpenBSD and NetBSD both have 64-bit time_t on 32-bit systems and have
had for four or five years at this point.

    - Kevin