From: Michael Ellerman <michael@ellerman.id.au>
Date: Fri, 11 Oct 2013 03:07:57 +0000 (+1100)
Subject: powerpc: Implement arch_get_random_long/int() for powernv
X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~19^2~67
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a4da0d50b2a00b79390092e6248ca88b7d93c81d;p=pandora-kernel.git

powerpc: Implement arch_get_random_long/int() for powernv

Add the plumbing to implement arch_get_random_long/int(). It didn't seem
worth adding an extra ppc_md hook for int, so we reuse the one for long.

Add an implementation for powernv based on the hwrng found in power7+
systems. We whiten the output of the hwrng, and the result passes all
the dieharder tests.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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