[RFC PATCH 2/3] net: Replace for_each_possible_cpu with for_each_online_cpu

[Jia He]

In PowerPC server with large number cpus, the loop index in smt=1 could be 
reduced to 1/8 compared with smt=8.
Thus cache misses can be reduced.

Signed-off-by: Jia He <hejia...@gmail.com>
Cc: "David S. Miller" <da...@davemloft.net>
Cc: Alexey Kuznetsov <kuz...@ms2.inr.ac.ru>
Cc: James Morris <jmor...@namei.org>
Cc: Hideaki YOSHIFUJI <yoshf...@linux-ipv6.org>
Cc: Patrick McHardy <ka...@trash.net>
---
 net/ipv6/addrconf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 43fa8d0..1fce613 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -4969,7 +4969,7 @@ static inline void __snmp6_fill_stats64(u64 *stats, void 
__percpu *mib,
 
        buff[0] = IPSTATS_MIB_MAX;
 
-       for_each_possible_cpu(c) {
+       for_each_online_cpu(c) {
                for (i = 1; i < IPSTATS_MIB_MAX; i++)
                        buff[i] += snmp_get_cpu_field64(mib, c, i, syncpoff);
        }
-- 
2.5.0