摘要： ++++++++++++++++++++++++++++++++++++++++++本文系本站原创,欢迎转载! 转载请注明出处:http://blog.csdn.net/mr_raptor/article/details/6269507++++++++++++++++++++++++++++++++++++++++++一、设备注册（fs/char_dev.c）register_chrdev_region-> __register_chrdev_region-> 主要任务：从struct char_device_struct类型的全局变量chrdevs[255]中倒着找到第一个可用的 阅读全文