linux进程地址空间

#include <linux/module.h>
#include <linux/init.h>

MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Xie");
MODULE_DESCRIPTION("Memory alloc Module");
MODULE_ALIAS("malloc module");

char *buf1 = NULL;
char *buf2 = NULL;


int alloc_init()
{
    buf1 = kmalloc(100,GFP_KERNEL);
    memset(buf1,0,100);
    strcpy(buf1,"<<< --- Kmalloc Mem OK! --- >>>");
    printk("<0>BUF 1 : %s\n",buf1);

    buf2 = get_zeroed_page(GFP_KERNEL);
    strcpy(buf2,"<<<--- Get Free Page OK! --- >>>");
    printk("<0>BUF 2 : %s\n",buf2);
    return 0;
}


void alloc_exit()
{
    kfree(buf1);
    free_page(buf2);
    printk("<0><<< --- Module Exit! --->>>\n");
}

module_init(alloc_init);
module_exit(alloc_exit);

ifneq ($(KERNELRELEASE),)

obj-m := alloc_mem.o

else

KDIR := /home/guoqian/4-3-1/linux-2.6.29
all:
    make -C $(KDIR) M=$(PWD) modules ARCH=arm CROSS_COMPILE=arm-linux-
clean:
    rm -f *.ko *.o *.mod.o *.mod.c *.symvers modul*

endif