linux-kernel - Re: [PATCH 1/2] x86/tsc: Avoid a double call if TSC initializes earlier.

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Message-ID: <20180730093447.GF2494@hirez.programming.kicks-ass.net>
Date:   Mon, 30 Jul 2018 11:34:47 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Dou Liyang <douly.fnst@...fujitsu.com>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org, tglx@...utronix.de,
        mingo@...hat.com, hpa@...or.com,
        Pavel Tatashin <pasha.tatashin@...cle.com>
Subject: Re: [PATCH 1/2] x86/tsc: Avoid a double call if TSC initializes
 earlier.

On Mon, Jul 30, 2018 at 03:54:20PM +0800, Dou Liyang wrote:
> static_branch_enable(&__use_tsc) may be called twice in common case, that
> is redundant.

It is also really not a problem...