From mboxrd@z Thu Jan  1 00:00:00 1970
From: Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH v6 1/2] blktrace: Fix potentail deadlock between delete
 & sysfs ops
Date: Tue, 19 Sep 2017 17:58:23 -0400
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To: Christoph Hellwig <hch@infradead.org>
Cc: Waiman Long <longman@redhat.com>, Jens Axboe <axboe@kernel.dk>, Ingo Molnar <mingo@kernel.org>, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, Bart Van Assche <Bart.VanAssche@wdc.com>

On Tue, 19 Sep 2017 13:41:35 -0700
Christoph Hellwig <hch@infradead.org> wrote:

> Call it blk_trace mutex and move it right next to the blk_trace
> structure:
> 
> ifdef CONFIG_BLK_DEV_IO_TRACE
>         struct blk_trace        *blk_trace;
> 	struct mutex		blk_trace_mutex;
> #endif
> 
> which makes it completely obvious to any read what you are protecting
> with it.

As a 1000ft away bystander, this appears to be the most logical
solution.

-- Steve