linux-kernel - Re: UIO and memory from dma_alloc_coherent

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Message-ID: <20140217191834.GA15282@kroah.com>
Date:	Mon, 17 Feb 2014 11:18:34 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Stanislav Meduna <stano@...una.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	hjk@...sjkoch.de
Subject: Re: UIO and memory from dma_alloc_coherent - UIO_MEM_PHYS?

On Mon, Feb 17, 2014 at 07:32:10PM +0100, Stanislav Meduna wrote:
> On 17.02.2014 19:18, Greg KH wrote:
> 
> > The uio_dmem_genirq.c driver showed up in 3.8, so it might be good for
> > you to update your kernel if you want to do DMA memory with a UIO
> > driver, as lots of other things in this area was fixed to accomplish
> > this.
> 
> Ah, OK, I will look into this.
> 
> I am stuck with 3.4 at the moment because of the real-time patches
> and some semantic changes there in the newer kernels necessitating
> much more tweak-and-test time than I currently have...

The real-time patches are available for 3.10, so that shouldn't be an
excuse anymore :)
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