linux-kernel - Re: [PATCH v2] gpiolib: allow poll(2) on gpio value

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Date:	Thu, 2 Jul 2009 11:57:33 -0700
From:	David Brownell <david-b@...bell.net>
To:	Jani Nikula <ext-jani.1.nikula@...ia.com>
Cc:	Daniel Glöckner <dg@...ix.com>,
	Ben Nizette <bn@...sdigital.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] gpiolib: allow poll(2) on gpio value

On Thursday 02 July 2009, Jani Nikula wrote:
> > Looks pretty clean.  Comments from anyone else?
> 
> I'd appreciate a kernel side interface to gpio_setup_irq functionality
> as well; now gpio_export from kernel won't setup support for poll(2)
> nor is there any possibility to do so.

I don't understand what you mean by this... there's no
file descriptor open at that time, so there's no poll()
that could be done.

And kernel-side functionality can just use existing
interfaces to do whatever it likes...

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