ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration

In order to provide PMU name strings compatible with the OProfile
user ABI, an enumeration of all PMUs is currently used by perf to
identify each PMU uniquely. Unfortunately, this does not scale well
in the presence of multiple PMUs and creates a single, global namespace
across all PMUs in the system.

This patch removes the enumeration and instead uses the name string
for the PMU to map onto the OProfile variant. perf_pmu_name is
implemented for CPU PMUs, which is all that OProfile cares about anyway.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 2 insertions, 18 deletions

diff --git a/arch/arm/include/asm/perf_event.h b/arch/arm/include/asm/perf_event.h
index 00cbe10a50e3..e074948d8143 100644
--- a/arch/arm/include/asm/perf_event.h
+++ b/arch/arm/include/asm/perf_event.h
@@ -12,21 +12,6 @@
 #ifndef __ARM_PERF_EVENT_H__
 #define __ARM_PERF_EVENT_H__
 
-/* ARM perf PMU IDs for use by internal perf clients. */
-enum arm_perf_pmu_ids {
-	ARM_PERF_PMU_ID_XSCALE1	= 0,
-	ARM_PERF_PMU_ID_XSCALE2,
-	ARM_PERF_PMU_ID_V6,
-	ARM_PERF_PMU_ID_V6MP,
-	ARM_PERF_PMU_ID_CA8,
-	ARM_PERF_PMU_ID_CA9,
-	ARM_PERF_PMU_ID_CA5,
-	ARM_PERF_PMU_ID_CA15,
-	ARM_PERF_PMU_ID_CA7,
-	ARM_NUM_PMU_IDS,
-};
-
-extern enum arm_perf_pmu_ids
-armpmu_get_pmu_id(void);
+/* Nothing to see here... */
 
 #endif /* __ARM_PERF_EVENT_H__ */
diff --git a/arch/arm/include/asm/pmu.h b/arch/arm/include/asm/pmu.h
index 90114faa9f3c..4432305f4a2a 100644
--- a/arch/arm/include/asm/pmu.h
+++ b/arch/arm/include/asm/pmu.h
@@ -103,10 +103,9 @@ struct pmu_hw_events {
 
 struct arm_pmu {
 	struct pmu	pmu;
-	enum arm_perf_pmu_ids id;
 	enum arm_pmu_type type;
 	cpumask_t	active_irqs;
-	const char	*name;
+	char		*name;
 	irqreturn_t	(*handle_irq)(int irq_num, void *dev);
 	void		(*enable)(struct hw_perf_event *evt, int idx);
 	void		(*disable)(struct hw_perf_event *evt, int idx);