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Date: Thu, 23 Jul 2015 19:54:36 +0200
From: Borislav Petkov <bp@alien8.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>, Jason Baron <jasonbaron0@gmail.com>,
        Andy Lutomirski <luto@amacapital.net>,
        Thomas Gleixner <tglx@linutronix.de>,
        Mikulas Patocka <mpatocka@redhat.com>,
        Paul Mackerras <paulus@samba.org>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Kees Cook <keescook@chromium.org>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Vince Weaver <vince@deater.net>, "hillf.zj" <hillf.zj@alibaba-inc.com>,
        Valdis Kletnieks <Valdis.Kletnieks@vt.edu>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Kernel broken on processors without performance counters
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On Thu, Jul 23, 2015 at 07:08:11PM +0200, Peter Zijlstra wrote:
> That would be bad, how can we force it to emit 5 bytes?

.byte 0xe9 like we used to do in static_cpu_has_safe().

Or you can copy the insn sizing from the alternatives macros which I
added recently.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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