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Commit 4eb41d10 authored by Christoph Lameter's avatar Christoph Lameter Committed by Tejun Heo
Browse files

this_cpu: Use this_cpu operations for SNMP statistics 



SNMP statistic macros can be signficantly simplified.
This will also reduce code size if the arch supports these operations
in hardware.

Acked-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarChristoph Lameter <cl@linux-foundation.org>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 30ed1a79

include/net/snmp.h

+18 −32
Original line number Diff line number Diff line
@@ -137,44 +137,30 @@ struct linux_xfrm_mib { 
#define SNMP_STAT_USRPTR(name)	(name[1])



#define SNMP_INC_STATS_BH(mib, field)	\

	(per_cpu_ptr(mib[0], raw_smp_processor_id())->mibs[field]++)

			__this_cpu_inc(mib[0]->mibs[field])

#define SNMP_INC_STATS_USER(mib, field)	\

	do { \

		per_cpu_ptr(mib[1], get_cpu())->mibs[field]++; \

		put_cpu(); \

	} while (0)

			this_cpu_inc(mib[1]->mibs[field])

#define SNMP_INC_STATS(mib, field)	\

	do { \

		per_cpu_ptr(mib[!in_softirq()], get_cpu())->mibs[field]++; \

		put_cpu(); \

	} while (0)

			this_cpu_inc(mib[!in_softirq()]->mibs[field])

#define SNMP_DEC_STATS(mib, field)	\

	do { \

		per_cpu_ptr(mib[!in_softirq()], get_cpu())->mibs[field]--; \

		put_cpu(); \

	} while (0)

#define SNMP_ADD_STATS(mib, field, addend) 	\

	do { \

		per_cpu_ptr(mib[!in_softirq()], get_cpu())->mibs[field] += addend; \

		put_cpu(); \

	} while (0)

			this_cpu_dec(mib[!in_softirq()]->mibs[field])

#define SNMP_ADD_STATS_BH(mib, field, addend)	\

	(per_cpu_ptr(mib[0], raw_smp_processor_id())->mibs[field] += addend)

			__this_cpu_add(mib[0]->mibs[field], addend)

#define SNMP_ADD_STATS_USER(mib, field, addend)	\

	do { \

		per_cpu_ptr(mib[1], get_cpu())->mibs[field] += addend; \

		put_cpu(); \

	} while (0)

			this_cpu_add(mib[1]->mibs[field], addend)

#define SNMP_UPD_PO_STATS(mib, basefield, addend)	\

	do { \

		__typeof__(mib[0]) ptr = per_cpu_ptr(mib[!in_softirq()], get_cpu());\

		__typeof__(mib[0]) ptr; \

		preempt_disable(); \

		ptr = this_cpu_ptr((mib)[!in_softirq()]); \

		ptr->mibs[basefield##PKTS]++; \

		ptr->mibs[basefield##OCTETS] += addend;\

		put_cpu(); \

		preempt_enable(); \

	} while (0)

#define SNMP_UPD_PO_STATS_BH(mib, basefield, addend)	\

	do { \

		__typeof__(mib[0]) ptr = per_cpu_ptr(mib[!in_softirq()], raw_smp_processor_id());\

		__typeof__(mib[0]) ptr = \

			__this_cpu_ptr((mib)[!in_softirq()]); \

		ptr->mibs[basefield##PKTS]++; \

		ptr->mibs[basefield##OCTETS] += addend;\

	} while (0)