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authorMatt Fleming <matt@console-pimps.org>2010-10-03 21:41:13 +0100
committerRobert Richter <robert.richter@amd.com>2010-10-11 17:45:49 +0200
commit84c7991059c9c4530cc911137c5bf508a41ed129 (patch)
tree1fc9f7c8139f680f3d899328128a38e5087c30c7
parent3bf101ba42a1c89b5afbc7492e7647dae5e18735 (diff)
perf: New helper function for pmu name
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>
-rw-r--r--arch/sh/kernel/perf_event.c9
-rw-r--r--include/linux/perf_event.h1
-rw-r--r--kernel/perf_event.c5
3 files changed, 15 insertions, 0 deletions
diff --git a/arch/sh/kernel/perf_event.c b/arch/sh/kernel/perf_event.c
index 2cb9ad59d4b1..55fe89bbdfe0 100644
--- a/arch/sh/kernel/perf_event.c
+++ b/arch/sh/kernel/perf_event.c
@@ -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)
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 1a0219247183..33f08dafda2f 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -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);
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 403d1804b198..e2534691db0d 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -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)