Perf: Toggle PMU IRQ when CPU's are hotplugged
When a CPU is hotplugged out while a perf session
is active, disarm the IRQ when the CPU is preparing
to die. This ensures that perf doesn't lock up when
it tries to free the irq of a hotplugged CPU.
Similarly, when a CPU comes online during a perf session
enable the IRQ so that perf doesn't try to disable
an unarmed IRQ when it finishes.
Change-Id: Ic4e412e5f1effae0db34a3e4b5e7e5c65faed2a0
Signed-off-by: Ashwin Chaugule <ashwinc@codeaurora.org>
diff --git a/arch/arm/include/asm/pmu.h b/arch/arm/include/asm/pmu.h
index 5188dbf..d1a3e61 100644
--- a/arch/arm/include/asm/pmu.h
+++ b/arch/arm/include/asm/pmu.h
@@ -151,6 +151,9 @@
struct hw_perf_event *hwc,
int idx);
+extern void enable_irq_callback(void *);
+extern void disable_irq_callback(void *);
+
#endif /* CONFIG_HW_PERF_EVENTS */
#endif /* __ARM_PMU_H__ */