From: Eric Dumazet Date: Sat, 4 Aug 2012 20:26:13 +0000 (+0000) Subject: net: avoid reloads in SNMP_UPD_PO_STATS X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d25398df59b56;p=linux-beck.git net: avoid reloads in SNMP_UPD_PO_STATS Avoid two instructions to reload dev->nd_net->mib.ip_statistics pointer, unsing a temp variable, in ip_rcv(), ip_output() paths for example. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- diff --git a/include/net/snmp.h b/include/net/snmp.h index 0147b901e79c..71596261fa99 100644 --- a/include/net/snmp.h +++ b/include/net/snmp.h @@ -154,13 +154,15 @@ struct linux_xfrm_mib { */ #define SNMP_UPD_PO_STATS(mib, basefield, addend) \ do { \ - this_cpu_inc(mib[0]->mibs[basefield##PKTS]); \ - this_cpu_add(mib[0]->mibs[basefield##OCTETS], addend); \ + __typeof__(*mib[0]->mibs) *ptr = mib[0]->mibs; \ + this_cpu_inc(ptr[basefield##PKTS]); \ + this_cpu_add(ptr[basefield##OCTETS], addend); \ } while (0) #define SNMP_UPD_PO_STATS_BH(mib, basefield, addend) \ do { \ - __this_cpu_inc(mib[0]->mibs[basefield##PKTS]); \ - __this_cpu_add(mib[0]->mibs[basefield##OCTETS], addend); \ + __typeof__(*mib[0]->mibs) *ptr = mib[0]->mibs; \ + __this_cpu_inc(ptr[basefield##PKTS]); \ + __this_cpu_add(ptr[basefield##OCTETS], addend); \ } while (0)