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

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Message-ID: <4E5E8F04.9030303@zytor.com>
Date:	Wed, 31 Aug 2011 12:44:04 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	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 08/31/2011 12:18 PM, Arnd Bergmann wrote:
>>
>> 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.
> 

The only reason I mentioned redefining 32-bit time_t as unsigned was for
*legacy ABIs*.

	-hpa


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