linux-kernel - Re: mmaping a kernel buffer to user space

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Message-ID: <20061102083109.GB1377@flint.arm.linux.org.uk>
Date:	Thu, 2 Nov 2006 08:31:09 +0000
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Guillermo Marcus Martinez <marcus@...uni-mannheim.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: mmaping a kernel buffer to user space

On Wed, Nov 01, 2006 at 01:58:17PM +0100, Guillermo Marcus Martinez wrote:
> My suggestion would be to add two functions: pci_map_consistent() and
> dma_map_coherent() to address this issue, and their corresponding
> unmap's. That will make sure all that is needed is done, is a clean and
> consistent with the pci_ and dma_ APIs, and fills a mmap requirement not
> covered by the other functions.

You might want to look through include/asm-arm/dma-mapping.h to see if
an architecture already has considered that and the interface they
implemented.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core
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