linux-kernel - Re: futex_cmpxchg

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Message-ID: <20180830103904.GA24160@hirez.programming.kicks-ass.net>
Date:   Thu, 30 Aug 2018 12:39:04 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Rich Felker <dalias@...c.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org
Subject: Re: futex_cmpxchg_enabled breakage

On Wed, Aug 29, 2018 at 06:22:21PM -0400, Rich Felker wrote:
> If there are archs that support SMP but don't provide their own

Then throw it out the window and drive over it with a tank.

Seriously, an SMP architecture that doesn't have native cmpxchg (or
equivalent) is not worth anybodies time.