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kerie/open_close.c

Created November 19, 2010 17:05
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open_close.c
static int rwbuf_open(struct inode *node, struct file *filep)
{
if(inuse==1)
return -1;
inuse=1;
printk(KERN_ALERT "open ok\n");
return 0;
}
static int rwbuf_close(struct inode *node, struct file *filep)
{
inuse = 0;
printk(KERN_ALERT "close ok\n");
return 0;
}
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