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Date: Sun, 15 Jun 2014 21:44:15 -0400
From: "Theodore Ts'o" <tytso@mit.edu>
To: Jet Chen <jet.chen@intel.com>
Cc: Greg Price <price@mit.edu>, Fengguang Wu <fengguang.wu@intel.com>,
        Yuanhan Liu <yuanhan.liu@intel.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, lkp@01.org
Subject: Re: [random] BUG: spinlock trylock failure on UP on CPU#0, swapper/1
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On Sun, Jun 15, 2014 at 03:12:54PM +0800, Jet Chen wrote:
> Hi Greg,
> 
> 0day kernel testing robot got the below dmesg and the first bad commit is
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> commit 0fb7a01af5b0cbe5bf365891fc4d186f2caa23f7
> Author:     Greg Price <price@MIT.EDU>
> AuthorDate: Thu Dec 5 19:32:19 2013 -0500
>
>     random: simplify accounting code

I believe I've found the problem, thanks for the report!

There was an earlier warning when this was in the random.git tree, but
I analyzed the bug report incorrectly and thought it was due to a bug
in lib/random32.c that would only show up in testing.  My bad for not
seeing the problem earlier.

The patch will be chained to this reply and sent to LKML.

  	       	     	 	  	     - Ted
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