[PATCH v3 2/6] uio: Add new UIO_MEM_PHYS_CACHE type for mem regions

Russell King - ARM Linux linux at arm.linux.org.uk
Fri Oct 31 02:35:57 PDT 2014

On Tue, Oct 21, 2014 at 08:38:23AM +0200, Kumar Gala wrote:
> Rather than adding a new type, why not allow the driver to set the

Please wrap your message.

That doesn't work.  A pgprot_t contains more than just memory type
information.  It also contains access permissions.  In other words,
if the user requested read-only or a read-write mapping, the
permissions will be different.

If you always use your stored pgprot_t, then you will override the
users requested permissions.

FTTC broadband for 0.8mile line: currently at 9.5Mbps down 400kbps up
according to speedtest.net.

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