diff options
Diffstat (limited to 'net/unix/af_unix.c')
| -rw-r--r-- | net/unix/af_unix.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index aca650109425..e9a287bc3142 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -565,6 +565,14 @@ static struct proto unix_proto = { .obj_size = sizeof(struct unix_sock), }; +/* + * AF_UNIX sockets do not interact with hardware, hence they + * dont trigger interrupts - so it's safe for them to have + * bh-unsafe locking for their sk_receive_queue.lock. Split off + * this special lock-class by reinitializing the spinlock key: + */ +static struct lock_class_key af_unix_sk_receive_queue_lock_key; + static struct sock * unix_create1(struct socket *sock) { struct sock *sk = NULL; @@ -580,6 +588,8 @@ static struct sock * unix_create1(struct socket *sock) atomic_inc(&unix_nr_socks); sock_init_data(sock,sk); + lockdep_set_class(&sk->sk_receive_queue.lock, + &af_unix_sk_receive_queue_lock_key); sk->sk_write_space = unix_write_space; sk->sk_max_ack_backlog = sysctl_unix_max_dgram_qlen; @@ -1045,7 +1055,7 @@ restart: goto out_unlock; } - unix_state_wlock(sk); + unix_state_wlock_nested(sk); if (sk->sk_state != st) { unix_state_wunlock(sk); |