编译一个简单的驱动程序模块时出错

bierdaci

下面是程序

#include <linux/kernel.h>
#include <linux/module.h>
#if CONFIG_MODVERSIONS==1
#define MODVERSIONS
#include <linux/modversions.h>
#endif

#include <linux/fs.h>
#include <linux/wrapper.h>

#include <asm/uaccess.h>

#define DEVICE_NAME "char_dev"
#define BUF_LEN 100
static int Device_Open = 0;
static char Message[BUF_LEN];
static char *Message_Ptr;
static int Major;

static int device_open(struct inode *inode, struct file *file)
{
        static int counter = 0;
       
        printk("Device: %d.%d\n", inode->i_rdev >> 8, inode->i_rdev & 0xFF);
        if (Device_open)
                return -EBUSY;
        Device_Open++;

        sprintf(Message, "If I told you once, I told you %d times - %s",
                counter++, "Hello, world\n");
        Message_Ptr = Message;
        MOD_INC_USE_COUNT;
        return SUCCESS;
}

static int device_release(struct inode *inode, struct file *file)
{
        Device_Open--;
        MOD_DEC_USE_COUNT;
        return 0;
}

static ssize_t device_read(struct file *file,char *buffer,
                        size_t length, loff_t *offset)
{
        int bytes_read = 0;
        if (*Message_Ptr == 0)
                return 0;
        while (length && *Message_Ptr) {
                copy_to_user(buffer++, *(Message_Ptr++), length--);
                bytes_read++;
        }
        return bytes_read;
}

static ssize_t device_write(struct file *file, const char *buffer,
                        size_t length, loff_t *offset)       
{
        int i;
        copy_from_user(Message, buffer, length);
        Message_Ptr = Message;
        return i;
}

struct file_operations Fops = {
        read:                device_read,
        write:                device_write,
        open:                device_open,
        release:        device_release
};

init init_module()
{
        Major = module_register_chrdev(0, DEVICE_NAME, &Fops);
        if (Major < 0) {
                printk ("%s device failed with %d\n",
                        "Sorry, registering the character",
                        Major);
                return Major;
        }
        printk ("%s The Major device number is %d.\n",
                "Registeration is a success.",
                Major);
        printk("If you want to talk to the device driver,\n");
        printk("you'll have to create a device file.\n");
        printk("We suggest you use:\n");
        printk("mknod <name> c %d <minor>\n", Major);
        printk("You can try different minor numbers %s",
                "and see what happens.\n");
        return 0;
}

void cleanup_module()
{
        int ret;
        ret = module_unregister_chrdev(Major, DEVICE_NAME);
        if (ret < 0)
                printk("Eror in unregister_chrdev: %d\n", ret);
}

这是Makefile文件
DFLAGS = -D__KERNEL__ -DMODULE -Wall -DLINUX -O2 -o

mydrv.o:        mydrv.c /usr/include/linux/version.h
        gcc  $(DFLAGS) -c mydrv.c

clean:
        rm -f *.o
下面有出错贴图

Dragonfly

pls do not post same question in two kernel boards at the same time.    

bierdaci

我没想到你是两个版的斑主，不过你都可以做两个斑主我也要两个版都发

Dragonfly

what i can say. if you like to waste teh resource and your time.  :-(