random: allow fractional bits to be tracked

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Allow fractional bits of entropy to be tracked by scaling the entropy
counter (fixed point).  This will be used in a subsequent patch that
accounts for entropy lost due to overwrites.

[ Modified by tytso to fix up a few missing places where the
  entropy_count wasn't properly converted from fractional bits to
  bits. ]

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

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H. Peter Anvin 2013-09-10 23:16:17 -04:00 • committed by Theodore Ts'o

parent 9ed17b70b4

commit a283b5c459

1 changed files with 92 additions and 46 deletions

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136

drivers/char/random.c

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