[NET]: Wider use of for_each_*cpu()
In 'net' change the explicit use of for-loops and NR_CPUS into the
general for_each_cpu() or for_each_online_cpu() constructs, as
appropriate. This widens the scope of potential future optimizations
of the general constructs, as well as takes advantage of the existing
optimizations of first_cpu() and next_cpu(), which is advantageous
when the true CPU count is much smaller than NR_CPUS.
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 1dcf7fa..e68700f 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1625,12 +1625,9 @@
memset(&ndst, 0, sizeof(ndst));
- for (cpu = 0; cpu < NR_CPUS; cpu++) {
+ for_each_cpu(cpu) {
struct neigh_statistics *st;
- if (!cpu_possible(cpu))
- continue;
-
st = per_cpu_ptr(tbl->stats, cpu);
ndst.ndts_allocs += st->allocs;
ndst.ndts_destroys += st->destroys;
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 5f043d3..00116d8 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -3065,12 +3065,9 @@
/* Register us to receive netdevice events */
register_netdevice_notifier(&pktgen_notifier_block);
- for (cpu = 0; cpu < NR_CPUS ; cpu++) {
+ for_each_online_cpu(cpu) {
char buf[30];
- if (!cpu_online(cpu))
- continue;
-
sprintf(buf, "kpktgend_%i", cpu);
pktgen_create_thread(buf, cpu);
}
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 90dca71..175e093 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -1108,12 +1108,9 @@
struct inet_sock *inet;
int i;
- for (i = 0; i < NR_CPUS; i++) {
+ for_each_cpu(i) {
int err;
- if (!cpu_possible(i))
- continue;
-
err = sock_create_kern(PF_INET, SOCK_RAW, IPPROTO_ICMP,
&per_cpu(__icmp_socket, i));
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index f7943ba..a65e508 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -90,9 +90,7 @@
unsigned long res = 0;
int i;
- for (i = 0; i < NR_CPUS; i++) {
- if (!cpu_possible(i))
- continue;
+ for_each_cpu(i) {
res += *(((unsigned long *) per_cpu_ptr(mib[0], i)) + offt);
res += *(((unsigned long *) per_cpu_ptr(mib[1], i)) + offt);
}
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index b7185fb..23e5403 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -700,10 +700,7 @@
struct sock *sk;
int err, i, j;
- for (i = 0; i < NR_CPUS; i++) {
- if (!cpu_possible(i))
- continue;
-
+ for_each_cpu(i) {
err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6,
&per_cpu(__icmpv6_socket, i));
if (err < 0) {
@@ -749,9 +746,7 @@
{
int i;
- for (i = 0; i < NR_CPUS; i++) {
- if (!cpu_possible(i))
- continue;
+ for_each_cpu(i) {
sock_release(per_cpu(__icmpv6_socket, i));
}
inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
diff --git a/net/ipv6/proc.c b/net/ipv6/proc.c
index 334a596..50a13e7 100644
--- a/net/ipv6/proc.c
+++ b/net/ipv6/proc.c
@@ -140,9 +140,7 @@
unsigned long res = 0;
int i;
- for (i = 0; i < NR_CPUS; i++) {
- if (!cpu_possible(i))
- continue;
+ for_each_cpu(i) {
res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt);
res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt);
}
diff --git a/net/sctp/proc.c b/net/sctp/proc.c
index b74f777..6e4dc28 100644
--- a/net/sctp/proc.c
+++ b/net/sctp/proc.c
@@ -69,9 +69,7 @@
unsigned long res = 0;
int i;
- for (i = 0; i < NR_CPUS; i++) {
- if (!cpu_possible(i))
- continue;
+ for_each_cpu(i) {
res +=
*((unsigned long *) (((void *) per_cpu_ptr(mib[0], i)) +
sizeof (unsigned long) * nr));
