insmod 명령어를 쓰면 lsmod에서 확인은 되는데 실행이 안되요...

[bushi@rose kernel_printf]$ 
[bushi@rose kernel_printf]$ cat hello2.c
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <asm/uaccess.h>
 
static struct file *my_filp = NULL;
 
static int printf(const char *fmt, ...)
{
        va_list args;
        char buf[128];
        unsigned int len;
        mm_segment_t fs;
        int ret;
        loff_t h = 0;
 
        va_start(args, fmt);
        len = vsnprintf(&buf[0], sizeof(buf) - 1, fmt, args);
        va_end(args);
        buf[len] = 0;
 
        fs = get_fs();
        set_fs(get_ds());
        ret = vfs_write(my_filp, &buf[0], len, &h);
        set_fs(fs);
 
        return ret;
}
 
inline int printf_init(void)
{
        struct task_struct *cur = get_current();
        /* -.-; */
        my_filp = filp_open("/proc/self/fd/1", O_WRONLY, 0);
        if (IS_ERR(my_filp)) {
                return PTR_ERR(my_filp);
        }
        get_file(my_filp);
        filp_close(my_filp, cur->files);
        return 0;
}
 
inline void printf_exit(void)
{
        fput(my_filp);
}
 
static int __init hello_init(void)
{
        int ret;
 
        ret = printf_init();
        if (ret < 0)
                return ret;
 
        printf("printf(): hello!\n");
        printk("printk(): hello!\n");
 
        return 0;
}
 
static void __exit hello_exit(void)
{
        printf_exit();
}
 
module_init(hello_init);
module_exit(hello_exit);
[bushi@rose kernel_printf]$ 
[bushi@rose kernel_printf]$ make
make[1]: Entering directory `/usr/src/kernels/2.6.23.15-80.fc7-i686'
  CC [M]  /work/CVS/test/bushi/kernel_printf/hello2.o
  Building modules, stage 2.
  MODPOST 1 modules
  CC      /work/CVS/test/bushi/kernel_printf/hello2.mod.o
  LD [M]  /work/CVS/test/bushi/kernel_printf/hello2.ko
make[1]: Leaving directory `/usr/src/kernels/2.6.23.15-80.fc7-i686'
[bushi@rose kernel_printf]$ 
[bushi@rose kernel_printf]$ 
[bushi@rose kernel_printf]$ sudo /sbin/insmod hello2.ko
printf(): hello!
[bushi@rose kernel_printf]$ 
[bushi@rose kernel_printf]$ sudo tail -1 /var/log/messages
Apr  9 05:26:48 rose kernel: printk(): hello!
[bushi@rose kernel_printf]$ 
[bushi@rose kernel_printf]$