[PATCH] arm64: fix early_io_map for 64K pages

Rob Herring robherring2 at gmail.com
Wed Feb 5 10:05:13 EST 2014

On Wed, Feb 5, 2014 at 8:52 AM, Will Deacon <will.deacon at arm.com> wrote:
> Hi Rob,
> On Wed, Feb 05, 2014 at 02:50:29PM +0000, Rob Herring wrote:
>> From: Rob Herring <robh at kernel.org>
>> earlyprintk is broken with 64KB pages. The problem is pgprot_default
>> is not yet initialized when early_io_map is called, so the pte does not
>> get marked as valid. Set the necessary page and access permission bits.
>> Cc: Mark Salter <msalter at redhat.com>
>> Cc: Catalin Marinas <catalin.marinas at arm.com>
>> Cc: Will Deacon <will.deacon at arm.com>
>> Signed-off-by: Rob Herring <robh at kernel.org>
>> ---
> I thought we fixed this in 4ce00dfcf19c by reverting the use of
> pgprot_default?

Ah crap. I only checked the history on mmu.c and missed that fix. And
I was so happy I found a kernel issue with qemu.


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