From: H. Peter Anvin <hpa@linux.intel.com>
Date: Sat, 28 Jul 2012 02:26:08 +0000 (-0400)
Subject: random: mix in architectural randomness in extract_buf()
X-Git-Tag: v3.2.27~35
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7499bd63d777215d16810b6fc9bd58fe83b4e576;p=pandora-kernel.git

random: mix in architectural randomness in extract_buf()

commit d2e7c96af1e54b507ae2a6a7dd2baf588417a7e5 upstream.

Mix in any architectural randomness in extract_buf() instead of
xfer_secondary_buf().  This allows us to mix in more architectural
randomness, and it also makes xfer_secondary_buf() faster, moving a
tiny bit of additional CPU overhead to process which is extracting the
randomness.

[ Commit description modified by tytso to remove an extended
  advertisement for the RDRAND instruction. ]

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: DJ Johnston <dj.johnston@intel.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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