linux-kernel - Re: [RFC][PATCH 7/7] kref: Implement using refcount

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Date:   Thu, 26 Jan 2017 15:14:41 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Greg KH <gregkh@...uxfoundation.org>,
        Will Deacon <will.deacon@....com>,
        "Reshetova, Elena" <elena.reshetova@...el.com>,
        Arnd Bergmann <arnd@...db.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        David Windsor <dave@...gbits.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Hans Liljestrand <ishkamiel@...il.com>
Subject: Re: [RFC][PATCH 7/7] kref: Implement using refcount_t

On Mon, Nov 14, 2016 at 9:39 AM, Peter Zijlstra <peterz@...radead.org> wrote:
> Provide refcount_t, an atomic_t like primitive built just for
> refcounting.
>
> It provides overflow and underflow checks as well as saturation
> semantics such that when it overflows, we'll never attempt to free it
> again, ever.
>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>

Hi!

I see the other 6 patches from this series are in -next, but the
refcount_t implementation is still missing. What's needed to land this
in -next? It's blocking sending the atomic_t -> refcount_t patches,
which will likely all go through various maintainers, so we need to
have refcount_t first. :)

Thanks!

-Kees

-- 
Kees Cook
Nexus Security