Date: Tue, 28 Mar 2017 09:49:55 +0200 From: Arnd Bergmann <arnd@...db.de> To: Kees Cook <keescook@...omium.org> Cc: Andrew Donnellan <andrew.donnellan@....ibm.com>, LKML <linux-kernel@...r.kernel.org>, Emese Revfy <re.emese@...il.com>, Josh Triplett <josh@...htriplett.org>, PaX Team <pageexec@...email.hu>, Masahiro Yamada <yamada.masahiro@...ionext.com>, minipli@...linux.so, Russell King <linux@...linux.org.uk>, Catalin Marinas <catalin.marinas@....com>, Rasmus Villemoes <linux@...musvillemoes.dk>, David Brown <david.brown@...aro.org>, "benh@...nel.crashing.org" <benh@...nel.crashing.org>, Thomas Gleixner <tglx@...utronix.de>, Andrew Morton <akpm@...ux-foundation.org>, Jeff Layton <jlayton@...chiereds.net>, Sam Ravnborg <sam@...nborg.org>, "kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com> Subject: Re: [PATCH v5 1/4] gcc-plugins: Add the initify gcc plugin On Mon, Mar 27, 2017 at 6:14 PM, Kees Cook <keescook@...omium.org> wrote: > On Mon, Mar 27, 2017 at 12:38 AM, Andrew Donnellan > <andrew.donnellan@....ibm.com> wrote: >> On 01/02/17 07:24, Kees Cook wrote: >>> >>> From: Emese Revfy <re.emese@...il.com> >>> >>> 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... > > Cool, thanks. FWIW, note that this plugin is a bit back-burnered at > the moment. I've got this in my -next tree still, but it needs some > rather large changes to how it does its annotations before Linus will > accept it. I've tried turning it on again a few days ago and still got too many build problems with my randconfig tree, so I've turned it off again. I think I've already reported most of what I found now, so I did not send out new reports. Arnd
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