《Linux设备驱动开发详解》源码——export

/home/lihacker/develop/svn/ldd6410-read-only/training/kernel/drivers/export

< export_symb.c >

/*

 * A simple kernel module to introduce export symbol

 *

 * The initial developer of the original code is Baohua Song

 * . All Rights Reserved.

 */



#include 

#include 



MODULE_LICENSE("Dual BSD/GPL");



int add_integar(int a,int b)

{

	return a+b;

}



int sub_integar(int a,int b)

{

	return a-b;

}



EXPORT_SYMBOL(add_integar);

EXPORT_SYMBOL(sub_integar);

< Makefile >

KVERS = $(shell uname -r)

# Kernel modules
obj-m += export_symb.o

# Specify flags for the module compilation.
#EXTRA_CFLAGS=-g -O0

build: kernel_modules

kernel_modules:
	make -C /lib/modules/$(KVERS)/build M=$(CURDIR) modules

clean:
	make -C /lib/modules/$(KVERS)/build M=$(CURDIR) clean