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From:   Thomas Gleixner <tglx@linutronix.de>
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To:     Peter Zijlstra <peterz@infradead.org>
Cc:     LKML <linux-kernel@vger.kernel.org>, x86@kernel.org,
        David Woodhouse <dwmw2@infradead.org>,
        Andrew Cooper <andrew.cooper3@citrix.com>,
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        linux-csky@vger.kernel.org,
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        Mark Rutland <mark.rutland@arm.com>,
        Sabin Rapan <sabrapan@amazon.com>,
        "Michael Kelley (LINUX)" <mikelley@microsoft.com>,
        David Woodhouse <dwmw@amazon.co.uk>
Subject: Re: [patch v3 34/36] x86/smpboot: Implement a bit spinlock to
 protect the realmode stack
In-Reply-To: <20230509131340.GA83892@hirez.programming.kicks-ass.net>
References: <20230508181633.089804905@linutronix.de>
 <20230508185219.123719053@linutronix.de>
 <20230509131340.GA83892@hirez.programming.kicks-ass.net>
Date:   Tue, 09 May 2023 15:47:36 +0200
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On Tue, May 09 2023 at 15:13, Peter Zijlstra wrote:
> On Mon, May 08, 2023 at 09:44:22PM +0200, Thomas Gleixner wrote:
>
> Do we really care about performance here; or should we pick the simpler
> form? Also, 'lock' is a prefix, not an instruction.

Right. KISS is the way to go.