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Date: Fri, 30 Jun 2017 11:43:18 +1000
From: Michael Ellerman <>
To: Kees Cook <>, Andrew Morton <>
Cc: Daniel Borkmann <>, "kernel-hardening\" <>, LKML <>, Laura Abbott <>
Subject: Re: [RFC PATCH 1/4] Provide linux/set_memory.h

Kees Cook <> writes:

> On Thu, Jun 29, 2017 at 2:03 AM, Daniel Borkmann <> wrote:
>> On 06/29/2017 08:29 AM, Michael Ellerman wrote:
>>> Currently code that wants to use set_memory_ro() etc, needs to include
>>> asm/set_memory.h, which doesn't exist on all arches. Some code knows
>>> it only builds on arches which have the header, other code guards the
>>> inclusion with an #ifdef, neither is ideal.
>>> So create linux/set_memory.h. This always exists, so users don't need
>>> an #ifdef just to include the header.
>>> When CONFIG_ARCH_HAS_SET_MEMORY=y it includes asm/set_memory.h,
>>> otherwise it provides empty non-failing implementations.
>>> Signed-off-by: Michael Ellerman <>
>> Looks good to me, thanks!
>> Acked-by: Daniel Borkmann <>
>> I'm fine if Andrew or Kees picks up the bpf patch as well, I think
>> there shouldn't be any conflict with net-next on this one (and even
>> if so, then looks trivial to resolve).
> I nominate Andrew. ;) This should go in early in the merge window and
> the users can go late in the window. If Andrew has enough to do, I can
> carry it too; just say the word.
> This is a sane addition and allows for lines-of-code reduction in a
> few places. Thanks!

Andrew's picked them up in mmotm, thanks everyone.


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