임베디드 리눅스 timer 커널모듈 컴파일 해서 insmod하는데 symbol오류가 발생합니다. ㅠ 해결방법을 모르겠습니다.

KERDIR:=/home/ksm/ti-processor-sdk-linux-rt-am57xx-evm-05.01.00.11/board-support/linux-rt-4.14.67+gitAUTOINC+cfb76a2032-gcfb76a2032

PATHCEK:=/home/ksm/ti-processor-sdk-linux-rt-am57xx-evm-05.01.00.11/targetNFS

obj-m:=timer_dev.o

 

PWD:=$(shell pwd)

 

all:
	$(MAKE) C $(KERDIR) ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf tisdk_am57xx-evm-rt_defconfig
	$(MAKE) C $(KERDIR) ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf SUBDIRS=$(PWD) modules
	$(MAKE) C $(KERDIR) ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf INSTALL_MOD_PATH=/tmp INSTALL_MOD_STRIP=1 modules_install

 

clean:
	rm -rf *.ko
	rm -rf .mod.
	rm -rf .*.cmd
	rm -rf .tmp*
	rm -rf *.o
	rm -rf modules.order 
	rm -rf Module.markers
	rm -rf Module.symvers
	rm -rf /tmp/lib

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/version.h>

#include <linux/init.h>

#include <linux/fs.h>

#include <linux/sched.h>

#include <linux/interrupt.h>

#include <linux/wait.h>

#include <linux/ioport.h>

#include <linux/slab.h>

#include <linux/poll.h>

#include <linux/proc_fs.h>

#include <linux/workqueue.h>

#include <asm/uaccess.h>

#include <asm/ioctl.h>

#include <asm/unistd.h>

#include <asm/io.h>

#include <asm/irq.h>

#include <asm/gpio.h>

#include <linux/irq.h>

#include <linux/time.h>

#include <linux/timer.h>

#include <asm/mach/arch.h>

 

#define TIME_HZ 100

 

struct timer_list *timer;

static int TimerCount=0;

 

void Timer_function(unsigned long arg);

void Timer_register(struct timer_list* rtimer);

int timer_init(void);

void timer_exit(void);

 

void Timer_register(struct timer_list *rtimer)

{
    init_timer(timer);
    rtimer->expires = get_jiffies_64() + TIME_HZ;
    rtimer->data = 0;
    rtimer->function = Timer_function;
    add_timer(timer);

}

 

void Timer_function(unsigned long arg)

{
    printk(" Count : %d \n",TimerCount++);
    Timer_register(timer);

}

 

int timer_init(void)

{
    timer=kmalloc(sizeof(struct timer_list),GFP_KERNEL);
    if(timer == NULL) return -ENOMEM;

 
    memset(timer,0,sizeof(struct timer_list));
    Timer_register(timer);
    return 0;

}

 

void timer_exit(void)

{
    if(timer!= NULL)
    {
        del_timer(timer);
        kfree(timer);
    }

}

 

module_init(timer_init);

module_exit(timer_exit);

 

MODULE_LICENSE("Dual BSD/GPL");