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rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTER

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When assigning a NULL value to an RCU protected pointer, no barrier
is needed. The rcu_assign_pointer, used to handle that but will soon
change to not handle the special case.

Convert all rcu_assign_pointer of NULL value.

//smpl
@@ expression P; @@

- rcu_assign_pointer(P, NULL)
+ RCU_INIT_POINTER(P, NULL)

// </smpl>

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger
2011-08-01 16:19:00 +00:00
committed by David S. Miller
parent 76f793e3a4
commit a9b3cd7f32
55 changed files with 193 additions and 193 deletions
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net/socket.c
+2 -2
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@@ -2463,7 +2463,7 @@ int sock_register(const struct net_proto_family *ops)
lockdep_is_held(&net_family_lock)))
err = -EEXIST;
else {
rcu_assign_pointer(net_families[ops->family], ops);
RCU_INIT_POINTER(net_families[ops->family], ops);
err = 0;
}
spin_unlock(&net_family_lock);
@@ -2491,7 +2491,7 @@ void sock_unregister(int family)
BUG_ON(family < 0 || family >= NPROTO);
spin_lock(&net_family_lock);
rcu_assign_pointer(net_families[family], NULL);
RCU_INIT_POINTER(net_families[family], NULL);
spin_unlock(&net_family_lock);
synchronize_rcu();