linux-kernel - Re: [PATCH 01/25] asm-generic: Change time_t and clock

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Message-ID: <CAMuHMdUpy=xpQ3wJ0RahYJ+Bkwf3EL5KPWvmOqs_vQG5cXGwGg@mail.gmail.com>
Date:	Wed, 14 May 2014 12:44:28 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	James Hogan <james.hogan@...tec.com>,
	Ley Foon Tan <lftan@...era.com>,
	Linux-Arch <linux-arch@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Chung-Lin Tang <cltang@...esourcery.com>,
	Arnd Bergmann <arnd@...db.de>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 01/25] asm-generic: Change time_t and clock_t to 64 bit

On Wed, May 14, 2014 at 5:47 AM, H. Peter Anvin <hpa@...or.com> wrote:
> On 05/13/2014 03:22 AM, James Hogan wrote:
>>> When we export this posix_types.h file for user software, they need to
>>> define this config, eg: CONFIG_32BIT_TIME to use 32 bit time. Is this
>>> what we want to do?
>>
>> Yeh, good point, that won't work.
>
> How about:
>
> #include <asm-generic/types/time32.h>
>
> The asm-generic/types/ directory can be used for all kinds of type
> templates, like int-ll64.h and the (now removed) former int-l64.h.

That should more or less work. But better call it time-l.h, as time_t
should be 64-bit on 64-bit architectures. Else 32/64-bit architectures
still need an #ifdef.

Will time_t stay "long" (and not become "long long") on 64-bit?

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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