netdev - [RFC net-next 04/20] net/smc: refactor smc_accept

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Date: Tue, 20 Feb 2024 15:01:29 +0800
From: "D. Wythe" <alibuda@...ux.alibaba.com>
To: kgraul@...ux.ibm.com,
	wenjia@...ux.ibm.com,
	jaka@...ux.ibm.com,
	wintera@...ux.ibm.com,
	guwen@...ux.alibaba.com
Cc: kuba@...nel.org,
	davem@...emloft.net,
	netdev@...r.kernel.org,
	linux-s390@...r.kernel.org,
	linux-rdma@...r.kernel.org,
	tonylu@...ux.alibaba.com,
	pabeni@...hat.com,
	edumazet@...gle.com
Subject: [RFC net-next 04/20] net/smc: refactor smc_accept_poll

From: "D. Wythe" <alibuda@...ux.alibaba.com>

Refactoring smc_accept_poll to extract a common function for
determining whether the accept_queue is empty.

Signed-off-by: D. Wythe <alibuda@...ux.alibaba.com>
---
 net/smc/af_smc.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index e87af68..7966d06 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -2832,17 +2832,16 @@ static int smc_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
 	return rc;
 }
 
-static __poll_t smc_accept_poll(struct sock *parent)
+static inline bool smc_accept_queue_empty(struct sock *sk)
 {
-	struct smc_sock *isk = smc_sk(parent);
-	__poll_t mask = 0;
-
-	spin_lock(&isk->accept_q_lock);
-	if (!list_empty(&isk->accept_q))
-		mask = EPOLLIN | EPOLLRDNORM;
-	spin_unlock(&isk->accept_q_lock);
+	return list_empty(&smc_sk(sk)->accept_q);
+}
 
-	return mask;
+static __poll_t smc_accept_poll(struct sock *parent)
+{
+	if (!smc_accept_queue_empty(parent))
+		return EPOLLIN | EPOLLRDNORM;
+	return 0;
 }
 
 static __poll_t smc_poll(struct file *file, struct socket *sock,
-- 
1.8.3.1