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net/smc: use rcu_barrier() on module unload

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Add rcu_barrier() to make sure no RCU readers or callbacks are
pending when the module is unloaded.

Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun 2019-11-16 17:47:31 +01:00 committed by David S. Miller
parent a33a803cfe
commit 4ead9c96d5
1 changed files with 2 additions and 0 deletions
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2
net/smc/af_smc.c
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@ -25,6 +25,7 @@
#include <linux/in.h>
#include <linux/sched/signal.h>
#include <linux/if_vlan.h>
#include <linux/rcupdate_wait.h>
#include <net/sock.h>
#include <net/tcp.h>
@ -2111,6 +2112,7 @@ static void __exit smc_exit(void)
proto_unregister(&smc_proto);
smc_pnet_exit();
unregister_pernet_subsys(&smc_net_ops);
rcu_barrier();
}
module_init(smc_init);