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authorDaniel Borkmann <daniel@iogearbox.net>2015-10-08 01:20:38 +0200
committerDavid S. Miller <davem@davemloft.net>2015-10-08 05:26:38 -0700
commit897ece56e714a2cc64e6914cb89a362d7021b36e (patch)
treec965cddb6a87f0bc6d96cceaa36efe42af8158da /kernel/bpf/core.c
parent0dd50d1b0c003ab4f17597fe1198bb57a2fadc06 (diff)
downloadlinux-sh-897ece56e714a2cc64e6914cb89a362d7021b36e.tar.gz
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>
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