netdev - [PATCH V3 net-next 5/5] smc: increase / decrease static key

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Message-Id: <1437555592-16506-6-git-send-email-ubraun@linux.vnet.ibm.com>
Date:	Wed, 22 Jul 2015 10:59:52 +0200
From:	Ursula Braun <ubraun@...ux.vnet.ibm.com>
To:	davem@...emloft.net
Cc:	utz.bacher@...ibm.com, netdev@...r.kernel.org,
	linux-s390@...r.kernel.org, schwidefsky@...ibm.com,
	heiko.carstens@...ibm.com, ursula.braun@...ibm.com,
	ubraun@...ux.vnet.ibm.com
Subject: [PATCH V3 net-next 5/5] smc: increase / decrease static key

From: Ursula Braun <ursula.braun@...ibm.com>

To activate the smc-specific hooks in the TCP-code, static key "tcp_have_smc"
is increased and decreased. For now this is done at module load / unload time.

Signed-off-by: Ursula Braun <ursula.braun@...ibm.com>
---
 net/smc/af_smc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index ed62370..8256e17 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -3142,6 +3142,7 @@ static int __init af_smc_init(void)
 	if (rc)
 		goto out_sock;
 
+	static_key_slow_inc(&tcp_have_smc);
 	return 0;
 
 out_sock:
@@ -3154,6 +3155,7 @@ out:
 
 static void __exit af_smc_exit(void)
 {
+	static_key_slow_dec(&tcp_have_smc);
 	ib_unregister_client(&smc_ib_client);
 	sock_unregister(PF_SMC);
 	proto_unregister(&smc_proto);
-- 
2.3.8

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