timer

说明：  linux 内核定时器编程： 包括代码程序和makefile文件 my_timer定时器每个1s 打印1 和 second_timer定时器每隔2s打印2 将rar修改为.tar.bz2
(linux kernel timer programming: Including program code and the makefile my_timer timer print each 1s 2s 1 and second_timer timer every print 2)