netdev - [PATCH] snmp: SNMP_UPD_PO_STATS_BH() always called from softirq

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Date:	Mon, 21 Mar 2011 12:30:55 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>
Subject: [PATCH] snmp: SNMP_UPD_PO_STATS_BH() always called from softirq

We dont need to test if we run from softirq context, we definitely are.

This saves few instructions in ip_rcv() & ip_rcv_finish()

Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
diff --git a/include/net/snmp.h b/include/net/snmp.h
index 762e2ab..27461d6 100644
--- a/include/net/snmp.h
+++ b/include/net/snmp.h
@@ -150,7 +150,7 @@ struct linux_xfrm_mib {
 #define SNMP_UPD_PO_STATS_BH(mib, basefield, addend)	\
 	do { \
 		__typeof__(*mib[0]) *ptr = \
-			__this_cpu_ptr((mib)[!in_softirq()]); \
+			__this_cpu_ptr((mib)[0]); \
 		ptr->mibs[basefield##PKTS]++; \
 		ptr->mibs[basefield##OCTETS] += addend;\
 	} while (0)
@@ -202,7 +202,7 @@ struct linux_xfrm_mib {
 #define SNMP_UPD_PO_STATS64_BH(mib, basefield, addend)			\
 	do {								\
 		__typeof__(*mib[0]) *ptr;				\
-		ptr = __this_cpu_ptr((mib)[!in_softirq()]);		\
+		ptr = __this_cpu_ptr((mib)[0]);				\
 		u64_stats_update_begin(&ptr->syncp);			\
 		ptr->mibs[basefield##PKTS]++;				\
 		ptr->mibs[basefield##OCTETS] += addend;			\


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