cdev_add         1086 block/bsg.c    	ret = cdev_add(&bsg_cdev, MKDEV(bsg_major, 0), BSG_MAX_DEVS);
cdev_add          287 fs/char_dev.c  	err = cdev_add(cdev, MKDEV(cd->major, 0), 256);
cdev_add           27 include/linux/cdev.h int cdev_add(struct cdev *, dev_t, unsigned);