linux-kernel - Re: [GIT pull] smp/hotplug: Removal of notifiers

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Date:   Mon, 26 Dec 2016 08:45:31 +0100
From:   Markus Trippelsdorf <markus@...ppelsdorf.de>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [GIT pull] smp/hotplug: Removal of notifiers

On 2016.12.25 at 14:39 +0100, Thomas Gleixner wrote:
> Linus,
> 
> please pull the latest smp-urgent-for-linus git tree from:
> 
>    git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git smp-urgent-for-linus
> 
> Thomas Gleixner (11):
>       cpu/hotplug: Prevent overwriting of callbacks

The following commit:

 commit dc280d93623927570da279e99393879dbbab39e7
 Author: Thomas Gleixner <tglx@...utronix.de>
 Date:   Wed Dec 21 20:19:49 2016 +0100

     cpu/hotplug: Prevent overwriting of callbacks

results in an early OOPs during boot on my AMD machine.
I haven't wrote down the entire backtrace, but basically things start to
go wrong in mce_threshold_create_device() from
arch/x86/kernel/cpu/mcheck/mce_amd.c.

# CONFIG_HOTPLUG_CPU is not set 

Reverting the commit "fixes" the issue for me.

-- 
Markus