linux-kernel - Re: [PATCH] LinuxPPS (with new syscalls API)

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Message-Id: <20070701171325.29d8b184.sfr@canb.auug.org.au>
Date:	Sun, 1 Jul 2007 17:13:25 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Rodolfo Giometti <giometti@...eenne.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] LinuxPPS (with new syscalls API) - new version

On Sat, 30 Jun 2007 19:13:40 +0200 Rodolfo Giometti <giometti@...eenne.com> wrote:
>
> Maybe I can define a special struct for exchanging time data as:
> 
>    struct pps_timedata_s {
>       long sec;
>       long nsec;
>    }
> 
> and managing time data conversions at userland...
> 
> What do you think about that? :)

"long" is one of the datatypes that changes size between 32 bit and 64
bit, so not such a good choice. You could use __u32 or __64 (or
whatever), that makes it very clear that these are fixed size data types.

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/

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