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rhashtable: use get_random_u32 for hash_rnd

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This is much faster and just as secure. It also has the added benefit of
probably returning better randomness at early-boot on systems with
architectural RNGs.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Jason A. Donenfeld 2017-06-07 22:47:13 -04:00 committed by Theodore Ts'o
parent ae5b806a3d
commit d48ad080ec
1 changed files with 1 additions and 1 deletions
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lib/rhashtable.c
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@ -235,7 +235,7 @@ static struct bucket_table *bucket_table_alloc(struct rhashtable *ht,
INIT_LIST_HEAD(&tbl->walkers);
get_random_bytes(&tbl->hash_rnd, sizeof(tbl->hash_rnd));
tbl->hash_rnd = get_random_u32();
for (i = 0; i < nbuckets; i++)
INIT_RHT_NULLS_HEAD(tbl->buckets[i], ht, i);