linux-kernel - Re: [PATCH] DMA-API: Change dma_declare_coherent_memory() CPU address to phys_addr

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Message-ID: <20140501000750.GB21775@kroah.com>
Date:	Wed, 30 Apr 2014 17:07:50 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	linux-pci@...r.kernel.org, Randy Dunlap <rdunlap@...radead.org>,
	linux-kernel@...r.kernel.org,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	linux-doc@...r.kernel.org
Subject: Re: [PATCH] DMA-API: Change dma_declare_coherent_memory() CPU
 address to phys_addr_t

On Wed, Apr 30, 2014 at 02:33:21PM -0600, Bjorn Helgaas wrote:
> dma_declare_coherent_memory() takes two addresses for a region of memory: a
> "bus_addr" and a "device_addr".  I think the intent is that "bus_addr" is
> the physical address a *CPU* would use to access the region, and
> "device_addr" is the bus address the *device* would use to address the
> region.
> 
> Rename "bus_addr" to "phys_addr" and change its type to phys_addr_t.

Isn't this going to cause problems with the callers of this function?
You aren't changing them...

greg k-h
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