On Wed, Sep 23, 2015 at 03:28:07AM +0100, Salah Triki wrote:
> dgnc_poll_tick is declared global, so dgnc_driver_pollrate_store needs to 
> take the
> lock dgnc_poll_lock before modifying this variable. dgnc_poll_lock is the
> appropriate lock, since it is intended for poll scheduling and dgnc_poll_tick
> contains the poll rate. dgnc_poll_lock needs to be declare not static and
> extern in order to be visible for dgnc_driver_pollrate_store.
> 
> Signed-off-by: Salah Triki <salah.tr...@acm.org>
> ---
<snip>
> +     spin_lock_irqsave(&dgnc_poll_lock, flags);
If I remember correctly Greg asked why you are using spin_lock_irqsave()?

If you need to lock why you are not using mutex here?

regards
sudip
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