linux-kernel - Re: [PATCH 1/3] futex: remove duplicated code

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Message-ID: <877f45cil2.fsf@concordia.ellerman.id.au>
Date:   Sat, 04 Mar 2017 23:49:44 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Jiri Slaby <jslaby@...e.cz>, akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org, Jiri Slaby <jslaby@...e.cz>,
        Richard Henderson <rth@...ddle.net>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>,
        Vineet Gupta <vgupta@...opsys.com>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Richard Kuo <rkuo@...eaurora.org>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Michal Simek <monstr@...str.eu>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Jonas Bonn <jonas@...thpole.se>,
        Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>,
        Stafford Horne <shorne@...il.com>,
        "James E.J. Bottomley" <jejb@...isc-linux.org>,
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        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
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Subject: Re: [PATCH 1/3] futex: remove duplicated code

Jiri Slaby <jslaby@...e.cz> writes:

> There is code duplicated over all architecture's headers for
> futex_atomic_op_inuser. Namely op decoding, access_ok check for uaddr,
> and comparison of the result.
>
> Remove this duplication and leave up to the arches only the needed
> assembly which is now in arch_futex_atomic_op_inuser.

Looks OK and boots on powerpc. But I don't think anything's actually
calling those futex ops. Is there a test suite I should run?

Acked-by: Michael Ellerman <mpe@...erman.id.au> (powerpc)

cheers