netdev - [tipc-discussion][net 1/2] tipc: improve function tipc_wait_for

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Message-Id: <20190219042048.23243-2-tung.q.nguyen@dektech.com.au>
Date:   Tue, 19 Feb 2019 11:20:47 +0700
From:   Tung Nguyen <tung.q.nguyen@...tech.com.au>
To:     davem@...emloft.net, netdev@...r.kernel.org
Cc:     tipc-discussion@...ts.sourceforge.net
Subject: [tipc-discussion][net 1/2] tipc: improve function tipc_wait_for_cond()

Commit 844cf763fba6 ("tipc: make macro tipc_wait_for_cond() smp safe")
replaced finish_wait() with remove_wait_queue() but still used
prepare_to_wait(). This causes unnecessary conditional
checking  before adding to wait queue in prepare_to_wait().

This commit replaces prepare_to_wait() with add_wait_queue()
as the pair function with remove_wait_queue().

Acked-by: Ying Xue <ying.xue@...driver.com>
Acked-by: Jon Maloy <jon.maloy@...csson.com>
Signed-off-by: Tung Nguyen <tung.q.nguyen@...tech.com.au>
---
 net/tipc/socket.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 1217c90a363b..81b87916a0eb 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -388,7 +388,7 @@ static int tipc_sk_sock_err(struct socket *sock, long *timeout)
 		rc_ = tipc_sk_sock_err((sock_), timeo_);		       \
 		if (rc_)						       \
 			break;						       \
-		prepare_to_wait(sk_sleep(sk_), &wait_, TASK_INTERRUPTIBLE);    \
+		add_wait_queue(sk_sleep(sk_), &wait_);                         \
 		release_sock(sk_);					       \
 		*(timeo_) = wait_woken(&wait_, TASK_INTERRUPTIBLE, *(timeo_)); \
 		sched_annotate_sleep();				               \
-- 
2.17.1