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Date: Thu, 8 Feb 2018 15:53:49 +0100
From: Borislav Petkov <bp@alien8.de>
To: Rolf Neugebauer <rolf.neugebauer@docker.com>
Cc: Greg KH <gregkh@linuxfoundation.org>,
	Jia Zhang <zhang.jia@linux.alibaba.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Tony Luck <tony.luck@intel.com>, Ingo Molnar <mingo@redhat.com>,
	"H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: x86/microcode/intel: Division by zero panic in 4.9.79 and 4.4.114
Message-ID: <20180208145348.GC7964@pd.tnic>
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On Thu, Feb 08, 2018 at 01:55:48PM +0000, Rolf Neugebauer wrote:
> On the 4.4 kernel, 1f161f67a272c ("x86/microcode: Do the family check
> first") does not apply cleanly. Looks like it relies on 309aac77768c0
> ("x86/microcode: Decrease CPUID use") and 7a93a40be23e5
> ("x86/microcode: Remove local vendor variable") as well. These don't
> apply cleanly either.

It figures. The backporting game is hm, well, a fun one. :-)

> Should I just manually backport the functionality of 1f161f67a272c?

Yeah, try that first.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.