+#else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */
+static inline struct perf_event *
+wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
+ int cpu,
+ struct task_struct *task,
+ perf_overflow_handler_t callback)
+{
+ pid_t pid;
+
+ if (!task)
+ pid = -1;
+ else
+ pid = task->pid;
+
+ return perf_event_create_kernel_counter(attr, cpu, pid, callback);
+}
+
+#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36))
+#define local64_read(l) atomic64_read(l)