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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
Download Patch File Download Diff File Expand all files Collapse all files
net/802/garp.c
+2 -2
View File
@@ -553,7 +553,7 @@ static void garp_release_port(struct net_device *dev)
if (rtnl_dereference(port->applicants[i]))
return;
}
rcu_assign_pointer(dev->garp_port, NULL);
RCU_INIT_POINTER(dev->garp_port, NULL);
kfree_rcu(port, rcu);
}
@@ -605,7 +605,7 @@ void garp_uninit_applicant(struct net_device *dev, struct garp_application *appl
ASSERT_RTNL();
rcu_assign_pointer(port->applicants[appl->type], NULL);
RCU_INIT_POINTER(port->applicants[appl->type], NULL);
/* Delete timer and generate a final TRANSMIT_PDU event to flush out
* all pending messages before the applicant is gone. */
net/802/stp.c
+2 -2
View File
@@ -88,9 +88,9 @@ void stp_proto_unregister(const struct stp_proto *proto)
{
mutex_lock(&stp_proto_mutex);
if (is_zero_ether_addr(proto->group_address))
rcu_assign_pointer(stp_proto, NULL);
RCU_INIT_POINTER(stp_proto, NULL);
else
rcu_assign_pointer(garp_protos[proto->group_address[5] -
RCU_INIT_POINTER(garp_protos[proto->group_address[5] -
GARP_ADDR_MIN], NULL);
synchronize_rcu();