From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753930AbaCUOXR (ORCPT ); Fri, 21 Mar 2014 10:23:17 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:43241 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751687AbaCUOXF (ORCPT ); Fri, 21 Mar 2014 10:23:05 -0400 Date: Fri, 21 Mar 2014 07:24:29 -0700 From: "gregkh@linuxfoundation.org" To: Matt Sickler Cc: "hjk@hansjkoch.de" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH]: UIO read(2)/write(2) overrides Message-ID: <20140321142429.GA25833@kroah.com> References: <8FAD17D1809CB042A0963E8337B9FE3DD7D823@MB-EXC-04.daktronics.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8FAD17D1809CB042A0963E8337B9FE3DD7D823@MB-EXC-04.daktronics.lan> User-Agent: Mutt/1.5.22 (2013-10-16) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 21, 2014 at 02:20:11PM +0000, Matt Sickler wrote: > Tiny patch to let uio-based drivers override the read(2), write(2), and poll(2) syscalls. > The rationale is that some uio-based drivers might want the mmap(2) functionality > of UIO, but have no need for the IRQ semantics of read(2) and write(2). Can you submit a driver that uses these new interfaces as well? I don't want to add something that isn't used in the kernel. > > Signed-Off-by: Matt Sickler > --- > diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c > index a673e5b..da1bfc8 100644 > --- a/drivers/uio/uio.c > +++ b/drivers/uio/uio.c > @@ -505,6 +505,9 @@ static unsigned int uio_poll(struct file *filep, poll_table *wait) > struct uio_listener *listener = filep->private_data; > struct uio_device *idev = listener->dev; > > + if (idev->info->poll) > + return idev->info->poll(filep, wait); > + Your email client ate all the tabs and created a patch that can't be applied :(