From: Kumar Gala <galak@kernel.crashing.org>
To: "Hans J. Koch" <hjk@hansjkoch.de>
Cc: gregkh@suse.de, linuxppc-dev@ozlabs.org,
linux-kernel@vger.kernel.org, Kai Jiang <Kai.Jiang@freescale.com>
Subject: Re: [PATCH] uio: Support 36-bit physical addresses on 32-bit systems
Date: Wed, 12 Oct 2011 13:40:22 -0500 [thread overview]
Message-ID: <38B65690-DA92-4923-B2A4-6523DDDA579A@kernel.crashing.org> (raw)
In-Reply-To: <20111012161931.GE21852@local>
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 <Kai.Jiang@freescale.com>
>>>
>>> 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
next prev parent reply other threads:[~2011-10-12 18:40 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-12 14:35 Kumar Gala
2011-10-12 15:32 ` Hans J. Koch
2011-10-12 16:07 ` Kumar Gala
2011-10-12 16:15 ` Geert Uytterhoeven
2011-10-13 14:10 ` Tabi Timur-B04825
2011-10-13 14:25 ` Geert Uytterhoeven
2011-10-13 14:35 ` Timur Tabi
2011-10-12 16:16 ` Hans J. Koch
2011-10-12 16:19 ` Hans J. Koch
2011-10-12 18:40 ` Kumar Gala [this message]
2011-10-12 20:23 ` Hans J. Koch
2011-10-12 20:58 ` Kumar Gala
2011-10-13 15:50 Kumar Gala
2011-10-14 18:31 ` Hans J. Koch
2011-10-14 18:36 ` Greg KH
2011-10-14 18:46 ` Hans J. Koch
2011-10-17 16:00 ` Kumar Gala
2011-10-17 17:18 ` Hans J. Koch
2011-10-17 18:03 ` Hans J. Koch
2011-10-17 18:23 ` Greg KH
2011-10-17 18:50 ` Hans J. Koch
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