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Date: Wed, 12 Oct 2011 13:40:22 -0500 From: Kumar Gala <galak@...nel.crashing.org> To: "Hans J. Koch" <hjk@...sjkoch.de> Cc: gregkh@...e.de, linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org, Kai Jiang <Kai.Jiang@...escale.com> Subject: Re: [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 <Kai.Jiang@...escale.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-- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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