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authorDaniel Borkmann <daniel@iogearbox.net>2015-10-08 02:20:38 +0300
committerDavid S. Miller <davem@davemloft.net>2015-10-08 15:26:38 +0300
commit897ece56e714a2cc64e6914cb89a362d7021b36e (patch)
treec965cddb6a87f0bc6d96cceaa36efe42af8158da /lib
parent0dd50d1b0c003ab4f17597fe1198bb57a2fadc06 (diff)
downloadlinux-897ece56e714a2cc64e6914cb89a362d7021b36e.tar.xz
random32: add prandom_init_once helper for own rngs
Add a prandom_init_once() facility that works on the rnd_state, so that users that are keeping their own state independent from prandom_u32() can initialize their taus113 per cpu states. The motivation here is similar to net_get_random_once(): initialize the state as late as possible in the hope that enough entropy has been collected for the seeding. prandom_init_once() makes use of the recently introduced prandom_seed_full_state() helper and is generic enough so that it could also be used on fast-paths due to the DO_ONCE(). Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib')
-rw-r--r--lib/random32.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/random32.c b/lib/random32.c
index 36c09fb3fec9..12111910ccd0 100644
--- a/lib/random32.c
+++ b/lib/random32.c
@@ -238,7 +238,7 @@ static void __init __prandom_start_seed_timer(void)
add_timer(&seed_timer);
}
-static void prandom_seed_full_state(struct rnd_state __percpu *pcpu_state)
+void prandom_seed_full_state(struct rnd_state __percpu *pcpu_state)
{
int i;