--- driver/adv_main.c.orig	2019-03-10 20:06:08.695818531 -0400
+++ driver/adv_main.c	2019-03-10 20:11:15.161215515 -0400
@@ -75,14 +75,21 @@ long adv_proc_ioctl(struct file *filp, u
 	if(_IOC_NR(cmd) > ADVVCOM_IOCMAX){
 		printk("%s(%d) cmd = %x\n", __func__, __LINE__, cmd);
 		return -ENOTTY;
 	}
 
+#include <linux/version.h>
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,0,0)
+#define compat_access_ok(u,v,w) access_ok(v,w)
+#else
+#define compat_access_ok(u,v,w) access_ok(u,v,w)
+#endif
+
 	if (_IOC_DIR(cmd) & _IOC_READ){
-		err = !access_ok(VERIFY_WRITE, (void __user *)arg, _IOC_SIZE(cmd));
+		err = !compat_access_ok(VERIFY_WRITE, (void __user *)arg, _IOC_SIZE(cmd));
 	}else if (_IOC_DIR(cmd) & _IOC_WRITE){
-		err =  !access_ok(VERIFY_READ, (void __user *)arg, _IOC_SIZE(cmd));
+		err =  !compat_access_ok(VERIFY_READ, (void __user *)arg, _IOC_SIZE(cmd));
 	}
 	if (err)
 		return -EFAULT;
 
 	data = filp->private_data;