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[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>
This commit is contained in:
John Hawkes 2005-10-13 09:30:31 -07:00 committed by Arnaldo Carvalho de Melo
parent 900e0143a5
commit 670c02c2bf
7 changed files with 8 additions and 28 deletions
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5
net/core/neighbour.c
View File

@ -1625,12 +1625,9 @@ static int neightbl_fill_info(struct neigh_table *tbl, struct sk_buff *skb,
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;

5
net/core/pktgen.c
View File

@ -3065,12 +3065,9 @@ static int __init pg_init(void)
/* 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);
}

5
net/ipv4/icmp.c
View File

@ -1108,12 +1108,9 @@ void __init icmp_init(struct net_proto_family *ops)
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));

4
net/ipv4/proc.c
View File

@ -90,9 +90,7 @@ fold_field(void *mib[], int offt)
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);
}

9
net/ipv6/icmp.c
View File

@ -700,10 +700,7 @@ int __init icmpv6_init(struct net_proto_family *ops)
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 @@ void icmpv6_cleanup(void)
{
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);

4
net/ipv6/proc.c
View File

@ -140,9 +140,7 @@ fold_field(void *mib[], int offt)
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);
}

4
net/sctp/proc.c
View File

@ -69,9 +69,7 @@ fold_field(void *mib[], int nr)
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));