linux-kernel - Re: [PATCH v2 03/36] mm: use do_futex() instead of sys_futex() in mm

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Message-ID: <alpine.DEB.2.21.1803161258290.1598@nanos.tec.linutronix.de>
Date:   Fri, 16 Mar 2018 12:58:59 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Dominik Brodowski <linux@...inikbrodowski.net>
cc:     linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
        viro@...iv.linux.org.uk, luto@...nel.org, mingo@...nel.org,
        akpm@...ux-foundation.org, arnd@...db.de,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Darren Hart <dvhart@...radead.org>
Subject: Re: [PATCH v2 03/36] mm: use do_futex() instead of sys_futex() in
 mm_release()

On Thu, 15 Mar 2018, Dominik Brodowski wrote:

> sys_futex() is a wrapper to do_futex() which does not modify any
> values here:
> 
> - uaddr, val and val3 are kept the same
> 
> - op is masked with FUTEX_CMD_MASK, but is always set to FUTEX_WAKE.
>   Therefore, val2 is always 0.
> 
> - as utime is set to NULL, *timeout is NULL
> 
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Darren Hart <dvhart@...radead.org>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Signed-off-by: Dominik Brodowski <linux@...inikbrodowski.net>

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