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Subject: Re: Build error in 3.18.y-stable-queue (s390)
To: Guenter Roeck <linux@roeck-us.net>
References: <56F210BD.1060301@roeck-us.net> <56F219B0.3040107@roeck-us.net>
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Cc: stable <stable@vger.kernel.org>
From: Sasha Levin <sasha.levin@oracle.com>
Message-ID: <56F964DD.3050503@oracle.com>
Date: Mon, 28 Mar 2016 13:07:41 -0400
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On 03/27/2016 11:35 AM, Guenter Roeck wrote:
> Hi Sasha,
> 
> On 03/26/2016 10:41 PM, Sasha Levin wrote:
> ...
>>
>> Should be fixed now, I hope.
>>
> 
> Builds now all pass, but now I get runtime errors on arm and microblaze qemu tests.
> 
> WARNING: CPU: 0 PID: 33 at mm/mmap.c:2787 exit_mmap+0x1ac/0x230()
> 
> You'll need to also pick up commit b30fe6c7ced7 ("mm: fix false-positive warning
> on exit due mm_nr_pmds(mm)") to fix that.
> 
> The s390 qemu test now builds, but the test itself gets a RCU stall and hangs.
> Reverting "s390/mm: four page table levels vs. fork" fixes the problem.

I'm just going to remove "s390/mm: four page table levels vs. fork" and all commits
I've added as a prereq and will ask the maintainers for a proper backport.


Thanks,
Sasha