Re: [PATCH 4/5] usb:Push BKL on open down into the drivers

From: Oliver Neukum
Date: Tue Mar 30 2010 - 02:47:09 EST


Am Montag, 29. März 2010 15:46:59 schrieb Jiri Kosina:
> > it seems to me you cannot deadlock with the BKL and an rwsem,
> > as BKL will be dropped if a task blocks on the rwsem.
>
> Ah, right you are.
>
> > This is not a nice feature of the BKL to use. Do you have an alternative
> > idea?
>
> Not right now, without introducing additional lock into USB core or
> redesigning the hiddev node registration completely. Hmmm ...

Then you might want to add a comment so the next developer who wants to
eradicate BKL is warned.

Regards
Oliver
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