random: If we have arch_get_random_seed*(), try it before blocking
If we have arch_get_random_seed*(), try to use it for emergency refill
of the entropy pool before giving up and blocking on /dev/random. It
may or may not work in the moment, but if it does work, it will give
the user better service than blocking will.
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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