linux-kernel - Re: Regression: Kernel unbootable since commit 4d6b4e6

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Date:	Mon, 21 Dec 2015 16:45:41 -0600
From:	Larry Finger <Larry.Finger@...inger.net>
To:	"Busch, Keith" <keith.busch@...el.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Hanjun Guo <hanjun.guo@...aro.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"Wysocki, Rafael J" <rafael.j.wysocki@...el.com>
Subject: Re: Regression: Kernel unbootable since commit 4d6b4e6 - found by
 bisection

On 12/21/2015 03:24 PM, Busch, Keith wrote:
>> Since early in the 4.3-rcx series, my Dell Latitude D600 with a 32-bit kernel
>> fails to boot. Unfortunately, I did not discover this until late in the 4.4-rcX
>> cycle. The symptom is that the kernel echos the "Loading initial ramdisk ..."
>> message and then hangs.
>>
>> The problem was bisected to commit 4d6b4es" x86/PCI/ACPI: Use common interface
>> to support PCI host bridge" from Jiang Liu <jiang.liu@...ux.intel.com>.  The
>> bisection was tested by reverting the commit in question. I have not yet tried
>> to analyze the patch to see where it might be going wrong.
>>
>> Please suggest any trial prints to debug this issue.
>
> Does this fix help you? It is included with the most recent 4.4 rc.
>
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=727ae8be30b428082d3519817f4fb98b712d457d

Yes, that patch does fix my problem even though the commit message says it is 
needed for legacy AMD platforms. My laptop has a Celeron CPU, but the same 
considerations must apply.

Thanks,

Larry

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