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net/neighbor: use get_random_u32 for 32-bit hash random

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Using get_random_u32 here is faster, more fitting of the use case, and
just as cryptographically secure. It also has the benefit of providing
better randomness at early boot, which is when many of these structures
are assigned.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Jason A. Donenfeld 2017-06-07 23:00:05 -04:00 committed by Theodore Ts'o
parent d48ad080ec
commit b3d0f7895d
1 changed files with 1 additions and 2 deletions
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3
net/core/neighbour.c
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@ -312,8 +312,7 @@ out_entries:
static void neigh_get_hash_rnd(u32 *x)
{
get_random_bytes(x, sizeof(*x));
*x |= 1;
*x = get_random_u32() | 1;
}
static struct neigh_hash_table *neigh_hash_alloc(unsigned int shift)