linux-kernel - Re: [RFC][PATCH]: x86: clarify/fix no-op barriers for text_poke

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Message-ID: <20170731111648.6c7d62f2@gandalf.local.home>
Date:   Mon, 31 Jul 2017 11:16:48 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     jkosina@...e.cz, masami.hiramatsu.pt@...achi.com,
        hpa@...ux.intel.com, linux-kernel@...r.kernel.org, x86@...nel.org
Subject: Re: [RFC][PATCH]: x86: clarify/fix no-op barriers for
 text_poke_bp()

On Mon, 31 Jul 2017 17:04:11 +0200
Peter Zijlstra <peterz@...radead.org> wrote:

> Well, this is x86, its a NO-OP. The only reason to write barriers like

Is it really a nop?

> that is for documentation purposes and in that regard is confuses. IOW
> has negative value.

Not arguing. But a comment would have helped, even if it was

 /* This isn't really needed, but just being paranoid */

-- Steve