[PATCH] Skip unnecessary pte makeup when clearing it.

[Uwe Kleine-König]

On Fri, Feb 03, 2012 at 03:43:58PM +0800, bill4carson wrote:
> 
> 
> On 2012年02月03日 14:54, Uwe Kleine-König wrote:
> >Hello,
> >
> >On Mon, Jan 30, 2012 at 04:36:07PM +0800, bill4carson at gmail.com wrote:
> >>From: Bill Carson<bill4carson at gmail.com>
> >>
> >>If we are only about to clear a hardware pte entry, then pte makeup code is
> >>unnecessary for cpu_v7_set_pte_ext and armv6_set_pte_ext, so just skip it.
> >>
> >>Signed-off-by: Bill Carson<bill4carson at gmail.com>
> >I havn't tested and I don't know if the patch brings any advantages like
> >increased speed. But AFAICT it doesn't change the behaviour of
> >armv6_set_pte_ext and cpu_v7_set_pte_ext.
> >
> Hi, Uwe
> 
> I'm sorry I didn't state the purpose of this patch clearly.
> As a matter of fact, it does change the behavior of set_pte_ext :)
Depends on what you call behaviour (and it's not the 'u' you dropped
that makes a difference :-). I meant that the side effects don't change.
It's only that they are accomplished in a different (probably more
effective) way.

Best regards
Uwe

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Pengutronix e.K.                           | Uwe Kleine-König            |
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