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Date: Thu, 29 Jun 2017 09:11:10 -0700
From: Kees Cook <>
To: Andrew Morton <>
Cc: Daniel Borkmann <>, Michael Ellerman <>, 
	"" <>, LKML <>, 
	Laura Abbott <>
Subject: Re: [RFC PATCH 1/4] Provide linux/set_memory.h

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!

Acked-by: Kees Cook <>


Kees Cook
Pixel Security

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