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bpf: sockmap, hash table is RCU so readers do not need locks

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This removes locking from readers of RCU hash table. Its not
necessary.

Fixes: 8111038444 ("bpf: sockmap, add hash map support")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
John Fastabend 2018-07-05 08:06:01 -07:00 committed by Alexei Starovoitov
parent 547b3aa451
commit 1d1ef005db
1 changed files with 0 additions and 2 deletions
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2
kernel/bpf/sockmap.c
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@ -2467,10 +2467,8 @@ struct sock *__sock_hash_lookup_elem(struct bpf_map *map, void *key)
b = __select_bucket(htab, hash);
head = &b->head;
raw_spin_lock_bh(&b->lock);
l = lookup_elem_raw(head, hash, key, key_size);
sk = l ? l->sk : NULL;
raw_spin_unlock_bh(&b->lock);
return sk;
}