design the new driver in make menuconfig

design the new driver

1.driver程式中的進入點和結束點要用以下寫法
  int __init test_init(void) {  }
  void __exit test_exit(void) {  }
  module_init(test_init);
  module_exit(test_exit);
2.Modify for menuconfig 
  Character Driver
   – 2.4: kernel/drivers/char/Config.in
   – 2.6: Kernel/drivers/char/Kconfig
    /usr/src/linux-2.4.x /drivers/char/Config.in
     tristate ‘My test module' CONFIG_HELLO
    /usr/src/linux-2.6.x /drivers/char/Kconfig
     config HELLO
      tristate “My test module"
      help
      This is my test module
3.Add the New Item in the Makefile
  Character Driver
   – kernel/drivers/char/Makefile
    /usr/src/linux-2.4.x /drivers/char/Makefile
     obj-$(CONFIG_HELLO) += test.o
    /usr/src/linux-2.6.x /drivers/char/Makefile
     obj-$(CONFIG_HELLO) += test.o