linux-kernel - Re: Kevent POSIX timers support.

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Message-ID: <456B3016.9020706@redhat.com>
Date:	Mon, 27 Nov 2006 10:36:06 -0800
From:	Ulrich Drepper <drepper@...hat.com>
To:	David Miller <davem@...emloft.net>
CC:	johnpol@....mipt.ru, akpm@...l.org, netdev@...r.kernel.org,
	zach.brown@...cle.com, hch@...radead.org,
	chase.venters@...entec.com, johann.borck@...sedata.com,
	linux-kernel@...r.kernel.org, jeff@...zik.org, aviro@...hat.com
Subject: Re: Kevent POSIX timers support.

David Miller wrote:
> Now we'll have to have a compat layer for 32-bit/64-bit environments
> thanks to POSIX timers, which is rediculious.

We already have compat_sys_timer_create.  It should be sufficient just 
to add the conversion (if anything new is needed) there.  The pointer 
value can be passed to userland in one or two int fields, I don't really 
care.  When reporting the event to the user code we cannot just point 
into the ring buffer anyway.  So while copying the data we can rewrite 
it if necessary.  I see no need to complicate the code more than it 
already is.

-- 
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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