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authorHerbert Xu <herbert@gondor.apana.org.au>2005-06-18 22:56:42 -0700
committerDavid S. Miller <davem@davemloft.net>2005-06-18 22:56:42 -0700
commit1e061ab2e5aa50a84d68ca654773632f9c425bb6 (patch)
tree1406328bddda29edb7548dd9a43d6168cd8acc1a /net
parente0f9f8586a0b21fb3c7a4ead3804008d57dfdef7 (diff)
downloadop-kernel-dev-1e061ab2e5aa50a84d68ca654773632f9c425bb6.zip
op-kernel-dev-1e061ab2e5aa50a84d68ca654773632f9c425bb6.tar.gz
[SCTP]: Replace spin_lock_irqsave with spin_lock_bh
This patch replaces the spin_lock_irqsave call on the receive queue lock in SCTP with spin_lock_bh. Despite the proliferation of spin_lock_irqsave calls in this stack, it is only entered from the IPv4/IPv6 stack and user space. That is, it is never entered from hardirq context. The call in question is only called from recvmsg which means that IRQs aren't disabled. Therefore it is safe to replace it with spin_lock_bh. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sctp/socket.c8
1 files changed, 2 insertions, 6 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 2a3c0e0..e6926cb 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4368,15 +4368,11 @@ static struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags,
* However, this function was corrent in any case. 8)
*/
if (flags & MSG_PEEK) {
- unsigned long cpu_flags;
-
- sctp_spin_lock_irqsave(&sk->sk_receive_queue.lock,
- cpu_flags);
+ spin_lock_bh(&sk->sk_receive_queue.lock);
skb = skb_peek(&sk->sk_receive_queue);
if (skb)
atomic_inc(&skb->users);
- sctp_spin_unlock_irqrestore(&sk->sk_receive_queue.lock,
- cpu_flags);
+ spin_unlock_bh(&sk->sk_receive_queue.lock);
} else {
skb = skb_dequeue(&sk->sk_receive_queue);
}
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