Beispiel #1
0
static int zf_open(struct inode *inode, struct file *file)
{
	switch(MINOR(inode->i_rdev)){
		case WATCHDOG_MINOR:
			spin_lock(&zf_lock);
			if(zf_is_open){
				spin_unlock(&zf_lock);
				return -EBUSY;
			}

#ifdef CONFIG_WATCHDOG_NOWAYOUT
			MOD_INC_USE_COUNT;
#endif
			zf_is_open = 1;

			spin_unlock(&zf_lock);

			zf_timer_on();

			return 0;
		default:
			return -ENODEV;
	}
}
static int zf_open(struct inode *inode, struct file *file)
{
	switch(MINOR(inode->i_rdev)){
		case WATCHDOG_MINOR:
			spin_lock(&zf_lock);
			if(zf_is_open){
				spin_unlock(&zf_lock);
				return -EBUSY;
			}

			if (nowayout) {
				MOD_INC_USE_COUNT;
			}
			zf_is_open = 1;

			spin_unlock(&zf_lock);

			zf_timer_on();

			return 0;
		default:
			return -ENODEV;
	}
}