···21392139extern unsigned long get_wchan(struct task_struct *p);21402140extern struct task_struct *cpu_curr_snapshot(int cpu);2141214121422142+#include <linux/spinlock.h>21432143+21422144/*21432145 * In order to reduce various lock holder preemption latencies provide an21442146 * interface to see if a vCPU is currently running or not.