Messages in this thread | | | Subject | Re: [PATCH 3/4] powerpc/crypto: add 842 hardware compression driver | From | Michael Ellerman <> | Date | Fri, 20 Jul 2012 15:33:30 +1000 |
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On Thu, 2012-07-19 at 09:42 -0500, Seth Jennings wrote: > This patch adds the driver for interacting with the 842 > compression accelerator on IBM Power7+ systems.
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> +struct nx842_slentry { > + unsigned long ptr; /* Absolute address (use virt_to_abs()) */ > /+ unsigned long len; > +};
These days virt_to_abs() is just __pa() - ie. convert to a real address.
So you should just use __pa().
And you also need to be certain that you only call it on addresses where that makes sense, ie. not vmalloc etc.
cheers
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