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Date: Mon, 26 Jan 2015 18:49:16 -0500
From: Steven Rostedt <rostedt@goodmis.org>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: linux-kernel@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Ingo Molnar <mingo@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 00/16 v3] tracing: Add new file system tracefs
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On Mon, 26 Jan 2015 18:43:14 -0500
Steven Rostedt <rostedt@goodmis.org> wrote:
 
> That is, we can not hold i_mutex and take trace_types_lock.
> 
> trace_types_lock needs to be held with the creation or destruction of
> events, which is what mkdir an rmdir do.

Although, I can not remember how this happened, but lockdep blew up on
me with this. I'll look again.