[PATCH v4 01/13] mm/memblock: add MEMBLOCK_NOMAP attribute to memblock memory table

Hello Ard,

On Thu, Dec 3, 2015 at 4:55 PM, Ard Biesheuvel
[off-list ref] wrote:

On 30 November 2015 at 13:28, Ard Biesheuvel [off-list ref] wrote:

quoted

This introduces the MEMBLOCK_NOMAP attribute and the required plumbing
to make it usable as an indicator that some parts of normal memory
should not be covered by the kernel direct mapping. It is up to the
arch to actually honor the attribute when laying out this mapping,
but the memblock code itself is modified to disregard these regions
for allocations and other general use.
....

May I kindly ask team-mm/Andrew/Alexander to chime in here, and
indicate whether you are ok with this patch going in for 4.5? If so,
could you please provide your ack so the patch can be kept together
with the rest of the series, which depends on it?

I should note that this change should not affect any memblock users
that never set the MEMBLOCK_NOMAP flag, but please, if you see any
issues beyond 'this may conflict with other stuff we have queued for
4.5', please do let me know.

Just tested the kernel with this patch with qemu and real hardware and it
works, nothing does not brake for me.