提交 d25398df 编写于 作者: E Eric Dumazet 提交者: David S. Miller

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: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 9eb43e76
......@@ -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)
......
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