linux设备驱动程序简单示例

以一个hello word程序为例，展示最简单的linux设备驱动程序。hello.c#include #include MODULE_LICENSE("Dual BSD/GPL");static int hello_init(void){    printk(KERN_ERR "hello world! ");    return 0;}static void hello_exit(void){    printk(KERN_ERR "goodbye cruel world ");}module_init(hello_init);module_exit(hello_exit);hello.h:无makefile:ifneq ($(KERNELRELEASE),)obj-m := hello.oelseKERNELDIR ?= /root/rpmbuild/BUILD/kernel-3.10.0-693.21.1.el7/linux-3.10.0-693.21.1.el7.x86_64PWD := $(shell pwd)default:$(MAKE) -C $(KERNELDIR) M=$(PWD) modulesendif

hello
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.hello.ko.cmd
.hello.mod.o.cmd
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hello.mod
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