net: this_cpu_xxx conversions

Use modern this_cpu_xxx() api, saving few bytes on x86

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/sock.c b/net/core/sock.c
index 363bc26..b05b9b6 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2232,8 +2232,7 @@
 #ifdef CONFIG_NET_NS
 void sock_prot_inuse_add(struct net *net, struct proto *prot, int val)
 {
-	int cpu = smp_processor_id();
-	per_cpu_ptr(net->core.inuse, cpu)->val[prot->inuse_idx] += val;
+	__this_cpu_add(net->core.inuse->val[prot->inuse_idx], val);
 }
 EXPORT_SYMBOL_GPL(sock_prot_inuse_add);
 
@@ -2279,7 +2278,7 @@
 
 void sock_prot_inuse_add(struct net *net, struct proto *prot, int val)
 {
-	__get_cpu_var(prot_inuse).val[prot->inuse_idx] += val;
+	__this_cpu_add(prot_inuse.val[prot->inuse_idx], val);
 }
 EXPORT_SYMBOL_GPL(sock_prot_inuse_add);