linux-kernel - Re: linux-next: manual merge of the arm-soc tree with the arm-current tree

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Date:	Tue, 4 Sep 2012 08:08:24 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Olof Johansson <olof@...om.net>,
	linux-arm-kernel@...ts.infradead.org, linux-next@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Rob Herring <rob.herring@...xeda.com>,
	Russell King <rmk@....linux.org.uk>
Subject: Re: linux-next: manual merge of the arm-soc tree with the arm-current tree

On Tuesday 04 September 2012, Stephen Rothwell wrote:
> Today's linux-next merge of the arm-soc tree got a conflict in
> arch/arm/mm/mmu.c between commit a849088aa155 ("ARM: Fix ioremap() of
> address zero") from the arm-current tree and commit c2794437091a ("ARM:
> Add fixed PCI i/o mapping") from the arm-soc tree.
> 
> I am not sure how to fix this, so I have used the arm-current version of
> the change to pmd_empty_section_gap() since that changed the vm->flags.
> It may be that just changing the vm->flags value in vm_reserve_area_early()
> would be ok?

If I read this correctly, we want pci_reserve_io to use VM_ARM_STATIC_MAPPING
while pmd_empty_section_gap should use VM_ARM_EMPTY_MAPPING, so we probably
want to add a flag argument to the vm_reserve_area_early() function.

	Arnd
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