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Subject: Re: [PATCH] powerpc: Record vma->phys_addr in ioremap()
From: Michael Ellerman <michael@ellerman.id.au>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
In-Reply-To: <1291006613.32570.288.camel@pasglop>
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Date: Mon, 29 Nov 2010 16:04:16 +1100
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On Mon, 2010-11-29 at 15:56 +1100, Benjamin Herrenschmidt wrote:
> On Mon, 2010-11-29 at 15:26 +1100, Michael Ellerman wrote:
> > The vmalloc code can track the physical address of a vma, when the
> > vma is used for ioremap, if set it is displayed in /proc/vmallocinfo.
> >=20
> > Because get_vm_area_caller() doesn't know it's being called for
> > ioremap() it's up to the arch code to set the phys_addr. A bunch
> > of other arch's do this, I'm not sure why powerpc doesn't?
>=20
> Because I never noticed ? :-)

Yeah I figured. It seems to go back past 2.6.12 so who knows when it
went in, anyway it's useful.

cheers


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