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perf: New helper function for pmu name

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Introduce perf_pmu_name() helper function that returns the name of the
pmu. This gives us a generic way to get the name of a pmu regardless of
how an architecture identifies it internally.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Robert Richter <robert.richter@amd.com>
This commit is contained in:
Matt Fleming 2010-10-03 21:41:13 +01:00 committed by Robert Richter
parent 3bf101ba42
commit 84c7991059
3 changed files with 15 additions and 0 deletions
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9
arch/sh/kernel/perf_event.c
View File

@ -59,6 +59,15 @@ static inline int sh_pmu_initialized(void)
return !!sh_pmu;
}
const char *perf_pmu_name(void)
{
if (!sh_pmu)
return NULL;
return sh_pmu->name;
}
EXPORT_SYMBOL_GPL(perf_pmu_name);
int perf_num_counters(void)
{
if (!sh_pmu)

1
include/linux/perf_event.h
View File

@ -850,6 +850,7 @@ extern int perf_max_events;
extern const struct pmu *hw_perf_event_init(struct perf_event *event);
extern int perf_num_counters(void);
extern const char *perf_pmu_name(void);
extern void perf_event_task_sched_in(struct task_struct *task);
extern void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next);
extern void perf_event_task_tick(struct task_struct *task);

5
kernel/perf_event.c
View File

@ -85,6 +85,11 @@ void __weak hw_perf_enable(void) { barrier(); }
void __weak perf_event_print_debug(void) { }
extern __weak const char *perf_pmu_name(void)
{
return "pmu";
}
static DEFINE_PER_CPU(int, perf_disable_count);
void perf_disable(void)