#include <linux/errno.h>
#include <linux/init.h>
#include <linux/miscdevice.h>
+#include <linux/smp_lock.h>
#include <asm/io.h>
#include <asm/ebus.h>
static int riowd_open(struct inode *inode, struct file *filp)
{
+ cycle_kernel_lock();
nonseekable_open(inode, filp);
return 0;
}