linux-kernel - Re: RFD: x32 ABI system call numbers

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Message-ID: <1397886.AAh13B9r2H@wuerfel>
Date:	Wed, 31 Aug 2011 21:18:37 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Christoph Hellwig <hch@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"H.J. Lu" <hjl.tools@...il.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Richard Kuo <rkuo@...eaurora.org>,
	Mark Salter <msalter@...hat.com>,
	Jonas Bonn <jonas@...thpole.se>,
	Tobias Klauser <tklauser@...tanz.ch>
Subject: Re: RFD: x32 ABI system call numbers

On Wednesday 31 August 2011 09:48:35 Linus Torvalds wrote:
> On Wed, Aug 31, 2011 at 9:39 AM, Arnd Bergmann <arnd@...db.de> wrote:
> >
> > Well, we could chicken out and just use unsigned int for time_t on new
> > 32 bit ABIs, which would buy us time until ~2106 before we need to
> > convert everything to 64 bit...
> 
> You do realize that there are probably quite a lot of programs that
> depend on signed time_t because they really do care about dates before
> 1970?

Yes, it already occurred to me after I had written the above that we
really want it to be signed, especially to allow a meaningful conversion
at least one-way between 32 and 64 bit time_t values.

	Arnd
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