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Date: Tue, 28 Mar 2017 14:03:24 +1100
From: Andrew Donnellan <>
To: Kees Cook <>,
Cc: Emese Revfy <>, Arnd Bergmann <>,
        Josh Triplett <>,,,,,,,,,,,,,,
        linuxppc-dev <>,
        Michael Ellerman <>
Subject: Re: [PATCH v5 1/4] gcc-plugins: Add the initify
 gcc plugin

On 27/03/17 18:38, Andrew Donnellan wrote:
> On 01/02/17 07:24, Kees Cook wrote:
>> From: Emese Revfy <>
>> The kernel already has a mechanism to free up code and data memory that
>> is only used during kernel or module initialization.  This plugin will
>> teach the compiler to find more such code and data that can be freed
>> after initialization.
> Currently checking whether we can wire this up for powerpc without too
> many problems...

arch/powerpc/Kconfig and have successfully compiled and booted a modular 
and non-modular powernv_defconfig, it looks like we handle the .exit 
sections correctly.

Could this be folded in for further testing when you get around to v6, Kees?

Andrew Donnellan              OzLabs, ADL Canberra  IBM Australia Limited

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