Re: BUG: spinlock bad magic on CPU#0 on BeagleBone

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On 12/19/2012 10:44 PM, Bedia, Vaibhav wrote:
> On Thu, Dec 20, 2012 at 11:55:24, Stephen Boyd wrote:
>> On 12/19/2012 8:48 PM, Bedia, Vaibhav wrote:
>>> I tried out 3 variants of AM335x boards - 2 of these (BeagleBone and EVM) have DDR2
>>> and 1 has DDR3 (EVM-SK). The BUG is triggered on all of these at the same point.
>>>
>>> With Stephen's change I don't see this on any of the board variants :)
>>> New bootlog below.
>> Great! Can I have your Tested-by then? I'll wrap it up into a patch. Is
>> this is a new regression? From a glance at the code it looks to have
>> existed for quite a while now.
> I went back to a branch based off 3.7-rc4 and don't see the issue there. Not sure
> what is triggering this now.
>
> Tested-by: Vaibhav Bedia <vaibhav.bedia@xxxxxx>

Thanks. I was thrown off by the author date of this patch which
introduced your problem

commit 8823c079ba7136dc1948d6f6dcb5f8022bde438e
Author:     Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
AuthorDate: Sun Mar 7 18:49:36 2010 -0800
Commit:     Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
CommitDate: Mon Nov 19 05:59:18 2012 -0800

    vfs: Add setns support for the mount namespace


It seems to have a 2 year gap between commit date and author date.
Either way, it looks to be isolated to the 3.8 merge window but affects
quite a few architectures. Patch to follow shortly.

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