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this_cpu: Use this_cpu operations for SNMP statistics

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

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Christoph Lameter 2009-10-03 19:48:22 +09:00 committed by Tejun Heo
parent 30ed1a79f5
commit 4eb41d10c7
1 changed files with 18 additions and 32 deletions
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50
include/net/snmp.h
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@ -136,45 +136,31 @@ struct linux_xfrm_mib {
#define SNMP_STAT_BHPTR(name) (name[0]) #define SNMP_STAT_BHPTR(name) (name[0])
#define SNMP_STAT_USRPTR(name) (name[1]) #define SNMP_STAT_USRPTR(name) (name[1])
#define SNMP_INC_STATS_BH(mib, field) \ #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) \ #define SNMP_INC_STATS_USER(mib, field) \
do { \ this_cpu_inc(mib[1]->mibs[field])
per_cpu_ptr(mib[1], get_cpu())->mibs[field]++; \ #define SNMP_INC_STATS(mib, field) \
put_cpu(); \ this_cpu_inc(mib[!in_softirq()]->mibs[field])
} while (0) #define SNMP_DEC_STATS(mib, field) \
#define SNMP_INC_STATS(mib, field) \ this_cpu_dec(mib[!in_softirq()]->mibs[field])
do { \ #define SNMP_ADD_STATS_BH(mib, field, addend) \
per_cpu_ptr(mib[!in_softirq()], get_cpu())->mibs[field]++; \ __this_cpu_add(mib[0]->mibs[field], addend)
put_cpu(); \ #define SNMP_ADD_STATS_USER(mib, field, addend) \
} while (0) this_cpu_add(mib[1]->mibs[field], addend)
#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)
#define SNMP_ADD_STATS_BH(mib, field, addend) \
(per_cpu_ptr(mib[0], raw_smp_processor_id())->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)
#define SNMP_UPD_PO_STATS(mib, basefield, addend) \ #define SNMP_UPD_PO_STATS(mib, basefield, addend) \
do { \ 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##PKTS]++; \
ptr->mibs[basefield##OCTETS] += addend;\ ptr->mibs[basefield##OCTETS] += addend;\
put_cpu(); \ preempt_enable(); \
} while (0) } while (0)
#define SNMP_UPD_PO_STATS_BH(mib, basefield, addend) \ #define SNMP_UPD_PO_STATS_BH(mib, basefield, addend) \
do { \ 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##PKTS]++; \
ptr->mibs[basefield##OCTETS] += addend;\ ptr->mibs[basefield##OCTETS] += addend;\
} while (0) } while (0)