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perf, x86: Extract PEBS/BTS buffer free routines 

So that we may grow additional call-sites..

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Stephane Eranian <eranian@google.com>
LKML-Reference: <20101019134808.196793164@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2010-10-19 14:08:29 +02:00 committed by Ingo Molnar
parent d4429f608a
commit b39f88acd7
1 changed files with 25 additions and 5 deletions
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30
arch/x86/kernel/cpu/perf_event_intel_ds.c
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@ -74,6 +74,28 @@ static void fini_debug_store_on_cpu(int cpu)
wrmsr_on_cpu(cpu, MSR_IA32_DS_AREA, 0, 0);
}
static void release_pebs_buffer(int cpu)
{
struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
if (!ds || !x86_pmu.pebs)
return;
kfree((void *)(unsigned long)ds->pebs_buffer_base);
ds->pebs_buffer_base = 0;
}
static void release_bts_buffer(int cpu)
{
struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
if (!ds || !x86_pmu.bts)
return;
kfree((void *)(unsigned long)ds->bts_buffer_base);
ds->bts_buffer_base = 0;
}
static void release_ds_buffers(void)
{
int cpu;
@ -82,7 +104,6 @@ static void release_ds_buffers(void)
return;
get_online_cpus();
for_each_online_cpu(cpu)
fini_debug_store_on_cpu(cpu);
@ -92,13 +113,12 @@ static void release_ds_buffers(void)
if (!ds)
continue;
per_cpu(cpu_hw_events, cpu).ds = NULL;
release_pebs_buffer(cpu);
release_bts_buffer(cpu);
kfree((void *)(unsigned long)ds->pebs_buffer_base);
kfree((void *)(unsigned long)ds->bts_buffer_base);
per_cpu(cpu_hw_events, cpu).ds = NULL;
kfree(ds);
}
put_online_cpus();
}