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SubjectRe: [PATCH] uio: Support 36-bit physical addresses on 32-bit systems

On Oct 12, 2011, at 11:19 AM, Hans J. Koch wrote:

> On Wed, Oct 12, 2011 at 05:32:29PM +0200, Hans J. Koch wrote:
>> On Wed, Oct 12, 2011 at 09:35:45AM -0500, Kumar Gala wrote:
>>> From: Kai Jiang <>
>>> To support >32-bit physical addresses for UIO_MEM_PHYS type we need to
>>> extend the width of 'addr' in struct uio_mem. Numerous platforms like
>>> embedded PPC, ARM, and X86 have support for systems with larger physical
>>> address than logical.
>>> Since 'addr' may contain a physical, logical, or virtual address the
>>> easiest solution is to just change the type to 'unsigned long long'
>>> regardless of which type is utilized.
>> No. There's phys_addr_t for that purpose, defined in include/linux/types.h.
>> Please use that.
> I forgot: If you resend this, please update the documentation as well.
> (Documentation/DocBook/uio-howto.tmpl)

What would you look added or modified here?

- k

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