linux-kernel - Re: [PATCH v1 01/14] futex: Clarify FUTEX2 flags

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Date:   Mon, 31 Jul 2023 18:08:15 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Peter Zijlstra <peterz@...radead.org>, axboe@...nel.dk
Cc:     linux-kernel@...r.kernel.org, peterz@...radead.org,
        mingo@...hat.com, dvhart@...radead.org, dave@...olabs.net,
        andrealmeid@...lia.com, Andrew Morton <akpm@...ux-foundation.org>,
        urezki@...il.com, hch@...radead.org, lstoakes@...il.com,
        Arnd Bergmann <arnd@...db.de>, linux-api@...r.kernel.org,
        linux-mm@...ck.org, linux-arch@...r.kernel.org,
        malteskarupke@....de
Subject: Re: [PATCH v1 01/14] futex: Clarify FUTEX2 flags

ROn Fri, Jul 21 2023 at 12:22, Peter Zijlstra wrote:
> sys_futex_waitv() is part of the futex2 series (the first and only so
> far) of syscalls and has a flags field per futex (as opposed to flags
> being encoded in the futex op).
>
> This new flags field has a new namespace, which unfortunately isn't
> super explicit. Notably it currently takes FUTEX_32 and
> FUTEX_PRIVATE_FLAG.
>
> Introduce the FUTEX2 namespace to clarify this
>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>

Reviewed-by: Thomas Gleixner <tglx@...utronix.de>