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Message-ID: <20111012161931.GE21852@local> Date: Wed, 12 Oct 2011 18:19:31 +0200 From: "Hans J. Koch" <hjk@...sjkoch.de> To: "Hans J. Koch" <hjk@...sjkoch.de> Cc: Kumar Gala <galak@...nel.crashing.org>, 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 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) Thanks, Hans -- 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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