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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 <[email protected]>
Acked-by: Paul E. McKenney <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Stephen Hemminger 2011-08-01 16:19:00 +00:00 • committed by David S. Miller
commit a9b3cd7f32
55 changed files with 193 additions and 193 deletions
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4
net/phonet/af_phonet.c
View file

@ -480,7 +480,7 @@ int __init_or_module phonet_proto_register(unsigned int protocol,
if (proto_tab[protocol])
err = -EBUSY;
else
rcu_assign_pointer(proto_tab[protocol], pp);
RCU_INIT_POINTER(proto_tab[protocol], pp);
mutex_unlock(&proto_tab_lock);
return err;
@ -491,7 +491,7 @@ void phonet_proto_unregister(unsigned int protocol, struct phonet_protocol *pp)
{
mutex_lock(&proto_tab_lock);
BUG_ON(proto_tab[protocol] != pp);
rcu_assign_pointer(proto_tab[protocol], NULL);
RCU_INIT_POINTER(proto_tab[protocol], NULL);
mutex_unlock(&proto_tab_lock);
synchronize_rcu();
proto_unregister(pp->prot);

6
net/phonet/pn_dev.c
View file

@ -276,7 +276,7 @@ static void phonet_route_autodel(struct net_device *dev)
mutex_lock(&pnn->routes.lock);
for (i = 0; i < 64; i++)
if (dev == pnn->routes.table[i]) {
rcu_assign_pointer(pnn->routes.table[i], NULL);
RCU_INIT_POINTER(pnn->routes.table[i], NULL);
set_bit(i, deleted);
}
mutex_unlock(&pnn->routes.lock);
@ -390,7 +390,7 @@ int phonet_route_add(struct net_device *dev, u8 daddr)
daddr = daddr >> 2;
mutex_lock(&routes->lock);
if (routes->table[daddr] == NULL) {
rcu_assign_pointer(routes->table[daddr], dev);
RCU_INIT_POINTER(routes->table[daddr], dev);
dev_hold(dev);
err = 0;
}
@ -406,7 +406,7 @@ int phonet_route_del(struct net_device *dev, u8 daddr)
daddr = daddr >> 2;
mutex_lock(&routes->lock);
if (dev == routes->table[daddr])
rcu_assign_pointer(routes->table[daddr], NULL);
RCU_INIT_POINTER(routes->table[daddr], NULL);
else
dev = NULL;
mutex_unlock(&routes->lock);

6
net/phonet/socket.c
View file

@ -679,7 +679,7 @@ int pn_sock_bind_res(struct sock *sk, u8 res)
mutex_lock(&resource_mutex);
if (pnres.sk[res] == NULL) {
sock_hold(sk);
rcu_assign_pointer(pnres.sk[res], sk);
RCU_INIT_POINTER(pnres.sk[res], sk);
ret = 0;
}
mutex_unlock(&resource_mutex);
@ -695,7 +695,7 @@ int pn_sock_unbind_res(struct sock *sk, u8 res)
mutex_lock(&resource_mutex);
if (pnres.sk[res] == sk) {
rcu_assign_pointer(pnres.sk[res], NULL);
RCU_INIT_POINTER(pnres.sk[res], NULL);
ret = 0;
}
mutex_unlock(&resource_mutex);
@ -714,7 +714,7 @@ void pn_sock_unbind_all_res(struct sock *sk)
mutex_lock(&resource_mutex);
for (res = 0; res < 256; res++) {
if (pnres.sk[res] == sk) {
rcu_assign_pointer(pnres.sk[res], NULL);
RCU_INIT_POINTER(pnres.sk[res], NULL);
match++;
}
}