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Message-ID: <5d626b9b-5355-be94-e8e2-1be47f880f30@suse.cz>
Date: Thu, 18 Mar 2021 13:46:38 +0100
From: Vlastimil Babka <vbabka@...e.cz>
To: Kees Cook <keescook@...omium.org>, Thomas Gleixner <tglx@...utronix.de>
Cc: Alexander Potapenko <glider@...gle.com>,
Elena Reshetova <elena.reshetova@...el.com>, x86@...nel.org,
Andy Lutomirski <luto@...nel.org>, Peter Zijlstra <peterz@...radead.org>,
Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
Mark Rutland <mark.rutland@....com>, Alexander Popov <alex.popov@...ux.com>,
Ard Biesheuvel <ard.biesheuvel@...aro.org>, Jann Horn <jannh@...gle.com>,
David Hildenbrand <david@...hat.com>, Mike Rapoport <rppt@...ux.ibm.com>,
Andrew Morton <akpm@...ux-foundation.org>, Jonathan Corbet <corbet@....net>,
Randy Dunlap <rdunlap@...radead.org>, kernel-hardening@...ts.openwall.com,
linux-hardening@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 2/6] init_on_alloc: Optimize static branches
On 3/15/21 7:02 PM, Kees Cook wrote:
> The state of CONFIG_INIT_ON_ALLOC_DEFAULT_ON (and ...ON_FREE...) did not
> change the assembly ordering of the static branches: they were always out
> of line. Use the new jump_label macros to check the CONFIG settings to
> default to the "expected" state, which slightly optimizes the resulting
> assembly code.
>
> Reviewed-by: Alexander Potapenko <glider@...gle.com>
> Link: https://lore.kernel.org/lkml/CAG_fn=X0DVwqLaHJTO6Jw7TGcMSm77GKHinrd0m_6y0SzWOrFA@mail.gmail.com/
> Signed-off-by: Kees Cook <keescook@...omium.org>
For the fixed version
Acked-by: Vlastimil Babka <vbabka@...e.cz>
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