Re: [patch 1/3] hpet: factor timer allocate from open

From: Clemens Ladisch
Date: Mon Jul 26 2010 - 02:20:11 EST

Thomas Gleixner wrote:
> On Tue, 20 Jul 2010, akpm@xxxxxxxxxxxxxxxxxxxx wrote:
> > From: Magnus Lynch <maglyx@xxxxxxxxx>
> >
> > The current implementation of the /dev/hpet driver couples opening the
> > device with allocating one of the (scarce) timers (aka comparators). This
> > is a limitation in that the main counter may be valuable to applications
> > seeking a high-resolution timer who have no use for the interrupt
> > generating functionality of the comparators.
> And how exactly does this patch provide such functionality ? There is
> no interface which allows you to access the counter itself.

Through mmap(); this is the only interface of /dev/hpet that is actually
used in practice.

> Cc: Clemens Ladisch <clemens@xxxxxxxxxx>

Acked-by: Clemens Ladisch <clemens@xxxxxxxxxx>

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