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1)¿éÉ豸Çý¶¯µÄÄ£¿é¼ÓÔØÍê³ÉµÄ¹¤×÷ÈçÏÂ:
Ø ·ÖÅä,³õʼ»¯ÇëÇó¶ÓÁÐ,°ó¶¨ÇëÇó¶ÓÁкÍÇëÇóº¯Êý
Ø ·ÖÅä,³õʼ»¯gendisk,¸øgendiskµÄmajor,fops,queueµÈ³ÉÔ±¸³Öµ,×îºóÌí¼Ógendisk.
Ø ×¢²á¿éÉ豸Çý¶¯.
´úÂë1:ʹÓÃblk_alloc_queueº¯ÊýÍê³É¿éÉ豸Çý¶¯µÄÄ£¿é¼ÓÔØÄ£°å
    static int __init xxx_init(void){
        //·ÖÅägendisk
        xxx_disks = alloc_disk(1);
        if(!xxx_disks){
            goto out;
        }
        //¿éÉ豸Çý¶¯×¢²á
        if(register_blkdev(xxx_MAJOR, "xxx"){
            err = -EIO;
            goto out;
        }
        //"ÇëÇó¶ÓÁÐ"·ÖÅä
        xxx_queue = blk_alloc_queue(GFP_KERNEL);
        if(!xxx_queue){
            goto out_queue;
        }
        blk_queue_make_request(xxx_queue, &xxx_make_request);//°ó¶¨"ÖÆÔìÇëÇó"º¯Êý
        blk_queue_hardsect_size(xxx_queue,xxx_blocksize);//¸æÖªÄÚºËÓ²¼þÉÈÇø³ß´ç
        //gendisk³õʼ»¯
        xxx_disks->major = xxx_MAJOR;
        xxx_disks->first_minor = 0


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