[PATCH v2 10/12] ARM: only consider memblocks with NOMAP cleared for linear mapping

[Ard Biesheuvel]

On 16 November 2015 at 20:00, Russell King - ARM Linux
<linux at arm.linux.org.uk> wrote:
> On Mon, Nov 16, 2015 at 07:32:35PM +0100, Ard Biesheuvel wrote:
>> Take the new memblock attribute MEMBLOCK_NOMAP into account when
>> deciding whether a certain region is or should be covered by the
>> kernel direct mapping.
>
> It's probably worth looking at this as a replacement to the way
> arm_memblock_steal() works, provided NOMAP doesn't result in the
> memory being passed to the kernel allocators.  Thoughts?
>

Yes. The primary reason for NOMAP is that the memory is not removed,
so we don't lose the annotation that it is memory (which might be
useful, for instance, for /dev/mem attribute handling)