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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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4
net/can/af_can.c
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@@ -719,7 +719,7 @@ int can_proto_register(const struct can_proto *cp)
proto);
err = -EBUSY;
} else
rcu_assign_pointer(proto_tab[proto], cp);
RCU_INIT_POINTER(proto_tab[proto], cp);
mutex_unlock(&proto_tab_lock);
@@ -740,7 +740,7 @@ void can_proto_unregister(const struct can_proto *cp)
mutex_lock(&proto_tab_lock);
BUG_ON(proto_tab[proto] != cp);
rcu_assign_pointer(proto_tab[proto], NULL);
RCU_INIT_POINTER(proto_tab[proto], NULL);
mutex_unlock(&proto_tab_lock);
synchronize_rcu();