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perf_counter: Remove unused prev_state field 

This removes the prev_state field of struct perf_counter since
it is now unused.  It was only used by the cpu migration
counter, which doesn't use it any more.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <18979.35052.915728.626374@cargo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Paul Mackerras 2009-06-01 17:53:16 +10:00 committed by Ingo Molnar
parent 3f731ca60a
commit bf4e0ed3d0
2 changed files with 0 additions and 5 deletions
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1
include/linux/perf_counter.h
View File

@ -427,7 +427,6 @@ struct perf_counter {
const struct pmu *pmu; const struct pmu *pmu;
enum perf_counter_active_state state; enum perf_counter_active_state state;
enum perf_counter_active_state prev_state;
atomic64_t count; atomic64_t count;
/* /*

4
kernel/perf_counter.c
View File

@ -572,7 +572,6 @@ group_sched_in(struct perf_counter *group_counter,
if (ret) if (ret)
return ret < 0 ? ret : 0; return ret < 0 ? ret : 0;
group_counter->prev_state = group_counter->state;
if (counter_sched_in(group_counter, cpuctx, ctx, cpu)) if (counter_sched_in(group_counter, cpuctx, ctx, cpu))
return -EAGAIN; return -EAGAIN;
@ -580,7 +579,6 @@ group_sched_in(struct perf_counter *group_counter,
* Schedule in siblings as one group (if any): * Schedule in siblings as one group (if any):
*/ */
list_for_each_entry(counter, &group_counter->sibling_list, list_entry) { list_for_each_entry(counter, &group_counter->sibling_list, list_entry) {
counter->prev_state = counter->state;
if (counter_sched_in(counter, cpuctx, ctx, cpu)) { if (counter_sched_in(counter, cpuctx, ctx, cpu)) {
partial_group = counter; partial_group = counter;
goto group_error; goto group_error;
@ -657,7 +655,6 @@ static void add_counter_to_ctx(struct perf_counter *counter,
struct perf_counter_context *ctx) struct perf_counter_context *ctx)
{ {
list_add_counter(counter, ctx); list_add_counter(counter, ctx);
counter->prev_state = PERF_COUNTER_STATE_OFF;
counter->tstamp_enabled = ctx->time; counter->tstamp_enabled = ctx->time;
counter->tstamp_running = ctx->time; counter->tstamp_running = ctx->time;
counter->tstamp_stopped = ctx->time; counter->tstamp_stopped = ctx->time;
@ -820,7 +817,6 @@ static void __perf_counter_enable(void *info)
ctx->is_active = 1; ctx->is_active = 1;
update_context_time(ctx); update_context_time(ctx);
counter->prev_state = counter->state;
if (counter->state >= PERF_COUNTER_STATE_INACTIVE) if (counter->state >= PERF_COUNTER_STATE_INACTIVE)
goto unlock; goto unlock;
counter->state = PERF_COUNTER_STATE_INACTIVE; counter->state = PERF_COUNTER_STATE_INACTIVE;