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Date: Tue, 15 Jan 2013 15:17:47 -0800
From: Tejun Heo <tj@kernel.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ming Lei <ming.lei@canonical.com>, Alex Riesen <raa.lkml@gmail.com>,
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Subject: Re: USB device cannot be reconnected and khubd "blocked for more
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Hello, Linus

Will continue on another reply but this one is relevant so...

On Tue, Jan 15, 2013 at 10:18:45AM -0800, Linus Torvalds wrote:
> Tejun, is there a good way for code to see "I'm running in async
> context"? Then we could do something like

Almost.  With a bit of modification we can ask whether current is a
kworker, reach struct worker_struct via kthread_data() if so and then
test worker->current_func against the async workfn.

Thanks.

-- 
tejun