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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Tue, 25 Jul 2023 09:23:29 +0200
Message-ID: <CAMuHMdVr7d1QZYaRtAxafD3aJp7GMwKNVqe7HUDykoDjU+OdQg@mail.gmail.com>
Subject: Re: [PATCH v1 09/14] futex: Add sys_futex_requeue()
To:     Peter Zijlstra <peterz@infradead.org>
Cc:     tglx@linutronix.de, axboe@kernel.dk, linux-kernel@vger.kernel.org,
        mingo@redhat.com, dvhart@infradead.org, dave@stgolabs.net,
        andrealmeid@igalia.com, Andrew Morton <akpm@linux-foundation.org>,
        urezki@gmail.com, hch@infradead.org, lstoakes@gmail.com,
        Arnd Bergmann <arnd@arndb.de>, linux-api@vger.kernel.org,
        linux-mm@kvack.org, linux-arch@vger.kernel.org,
        malteskarupke@web.de
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On Fri, Jul 21, 2023 at 1:11 PM Peter Zijlstra <peterz@infradead.org> wrote:
> Finish of the 'simple' futex2 syscall group by adding
> sys_futex_requeue(). Unlike sys_futex_{wait,wake}() it's arguments are
> too numerous to fit into a regular syscall. As such, use struct
> futex_waitv to pass the 'source' and 'destination' futexes to the
> syscall.
>
> This syscall implements what was previously known as FUTEX_CMP_REQUEUE
> and uses {val, uaddr, flags} for source and {uaddr, flags} for
> destination.
>
> This design explicitly allows requeueing between different types of
> futex by having a different flags word per uaddr.
>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>

>  arch/m68k/kernel/syscalls/syscall.tbl       |    1

Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds