linux-kernel - Re: Clock register in early init

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Message-ID: <20120523091954.GA8730@tbergstrom-lnx.Nvidia.com>
Date:	Wed, 23 May 2012 12:19:54 +0300
From:	Peter De Schrijver <pdeschrijver@...dia.com>
To:	"Turquette, Mike" <mturquette@...com>
CC:	Ben Dooks <ben.dooks@...ethink.co.uk>,
	Prashant Gaikwad <pgaikwad@...dia.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: Clock register in early init

On Tue, May 22, 2012 at 07:37:15PM +0200, Turquette, Mike wrote:
> On Tue, May 22, 2012 at 5:08 AM, Peter De Schrijver
> <pdeschrijver@...dia.com> wrote:
> >> We had at-least that on the older Samsung parts and they where still
> >> growing. I would suggest that in a multi-kernel image situation the
> >> more data that can be discarded after init-time the better.
> >>
> >> Also, __initdata gets gathered into one place so there's no possibility
> >> of page fragmentation there. If you mean fragmentation of the memory
> >> map, then allocate the size of all the clocks you know of at init time
> >> in one go.
> >>
> >
> > That would work, except that clocks are needed before kmalloc is available.
> >
> 
> Is static initialization the only way to solve this problem?  What
> about using the bootmem allocator for early init clocks?
> 

If it can be handled inside the framework somehow. I would want to avoid
having several places where clocks inside the same SoC are initialized.

Cheers,

Peter.
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