From mboxrd@z Thu Jan  1 00:00:00 1970
From: Carsten Otte <cotte@de.ibm.com>
Subject: Re: [patch 4/6] xip: support non-struct page backed memory
Date: Mon, 03 Mar 2008 09:18:21 +0100
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References: <20080118045649.334391000@suse.de> <20080118045755.735923000@suse.de> <6934efce0803010014p2cc9a5edu5fee2029c0104a07@mail.gmail.com>
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Cc: npiggin@suse.de, Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	mschwid2@linux.vnet.ibm.com, heicars2@linux.vnet.ibm.com,
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To: Jared Hulbert <jaredeh@gmail.com>
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Jared Hulbert wrote:
> The problem is that virt_to_phys() gives bogus answer for a
> mtd->point()'ed address.  It's a ioremap()'ed address which doesn't
> work with the ARM virt_to_phys().  I can get a physical address from
> mtd->point() with a patch I dropped a little while back.
Is there a chance virt_to_phys() can be fixed on arm? It looks like a 
simple page table walk to me. If not, I would prefer to have 
get_xip_address return a physical address over having to split the 
code path here. S390 has a 1:1 mapping for xip mappings, thus it 
would'nt be a big change for us.