why do we still need bootmem allocator?

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To: linux-mm@xxxxxxxxx
Subject: why do we still need bootmem allocator?
From: Michal Hocko <mhocko@xxxxxxxxxx>
Date: Mon, 25 Jun 2018 16:07:54 +0200
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, linux-arch@xxxxxxxxxxxxxxx, LKML <linux-kernel@xxxxxxxxxxxxxxx>
User-agent: Mutt/1.9.5 (2018-04-13)

Hi,
I am wondering why do we still keep mm/bootmem.c when most architectures
already moved to nobootmem. Is there any fundamental reason why others
cannot or this is just a matter of work? Btw. what really needs to be
done? Btw. is there any documentation telling us what needs to be done
in that regards?
-- 
Michal Hocko
SUSE Labs

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