From: Michael Ellerman <michael@ellerman.id.au>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [PATCH] powerpc: Record vma->phys_addr in ioremap()
Date: Mon, 29 Nov 2010 16:04:16 +1100 [thread overview]
Message-ID: <1291007056.10110.60.camel@concordia> (raw)
In-Reply-To: <1291006613.32570.288.camel@pasglop>
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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.
> >
> > 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?
>
> 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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prev parent reply other threads:[~2010-11-29 5:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-29 4:26 [PATCH] powerpc: Record vma->phys_addr in ioremap() Michael Ellerman
2010-11-29 4:56 ` Benjamin Herrenschmidt
2010-11-29 5:04 ` Michael Ellerman [this message]
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