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authorMatt Mackall <mpm@selenic.com>2008-04-29 01:03:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-29 08:06:25 -0700
commite68e5b664ecb9bccf68102557107a6b6d739a97c (patch)
treef74a1d9585295463f166fdcffcc8e28527728b1a /sound/sh/aica.c
parent993ba2114c554c1561a018e5c63a771ec8e1c469 (diff)
downloadlinux-linaro-e68e5b664ecb9bccf68102557107a6b6d739a97c.tar.gz
random: make mixing interface byte-oriented
Switch add_entropy_words to a byte-oriented interface, eliminating numerous casts and byte/word size rounding issues. This also reduces the overall bit/byte/word confusion in this code. We now mix a byte at a time into the word-based pool. This takes four times as many iterations, but should be negligible compared to hashing overhead. This also increases our pool churn, which adds some depth against some theoretical failure modes. The function name is changed to emphasize pool mixing and deemphasize entropy (the samples mixed in may not contain any). extract is added to the core function to make it clear that it extracts from the pool. Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'sound/sh/aica.c')
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