On 03/03/2016 05:47 AM, Rob Herring wrote:

On Wed, Mar 2, 2016 at 4:56 PM, David Daney [off-list ref] wrote:

quoted

From: David Daney <david.daney-YGCgFSpz5w/QT0dZR+AlfA@public.gmane.org>

In order to extract NUMA information from the device tree, we need to
have the tree in its unflattened form.

Move the call to unflatten_device_tree() into paging_init().  This
puts it before the call to bootmem_init(), which is where the NUMA
information is extracted.

Can't you just move up unflatten_device_tree in setup_arch rather than
hiding in paging_init?

No.

It must come *after* map_mem() and *before* bootmem_init(), both of 
which are done within paging_init().

One option would be to split the things in paging_init() into two 
functions, and then do:

.
.
.
    paging_init_first_part();
    if (acpi_disabled)
        unflatten_device_tree();
    paging_init_second_part();
.
.
.

quoted

Signed-off-by: David Daney <david.daney-YGCgFSpz5w/QT0dZR+AlfA@public.gmane.org>
---
  arch/arm64/kernel/setup.c | 7 +++----
  arch/arm64/mm/mmu.c       | 5 +++++
  2 files changed, 8 insertions(+), 4 deletions(-)

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