pid_task + kill_pid -＞在内核态kill进程

#include <linux/sched.h>   
#include <linux/pid.h>     
#include <linux/sched/signal.h>  
 
struct task_struct *task, *p;
for_each_process(p)
{
	if(strcmp(p->comm, process_name) == 0) //process_name为要kill的进程名
	{
		task = pid_task(find_vpid(p->pid), PIDTYPE_PID);
		if(task != NULL)
			kill_pid(find_vpid(p->pid),SIGKILL,1);
		break;
	}
}

为什么使用find_vpid,参考这篇博客：https://blog.youkuaiyun.com/tomorrowCS/article/details/104782994