linux-kernel - Re: Linux 4.9.93

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Message-ID: <CABCJKud4BrqTQXTf6x=opEKuY5LZBffaHCTN8KWKzGeoP6aOpw@mail.gmail.com>
Date:   Mon, 09 Apr 2018 20:32:57 +0000
From:   Sami Tolvanen <samitolvanen@...gle.com>
To:     Greg Hackmann <ghackmann@...gle.com>
Cc:     gregkh@...uxfoundation.org, jb@...ential.com,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        LKML <linux-kernel@...r.kernel.org>,
        Will Deacon <will.deacon@....com>, dan.rue@...aro.org,
        mark.brown@...aro.org, marc.zyngier@....com
Subject: Re: Linux 4.9.93

On Mon, Apr 9, 2018 at 10:02 AM Greg Hackmann <ghackmann@...gle.com> wrote:
> Sami, what are the plans for upstreaming this work?

CFI is a clang-specific feature that depends on LTO. Based on the earlier
LTO discussion, we decided to collect some more evidence that clang's LTO
doesn't actually break anything in the kernel before sending out the next
revision of these patches. I will look into upstreaming this code again
once we have sufficient test coverage, hopefully by the end of the year.

Sami