--- at91_adc_driver/at91_adc.c	2010-05-18 02:19:13.000000000 -0400
+++ at91_adc_driver/at91_adc.c2638	2011-06-28 12:45:53.573646308 -0400
@@ -31,9 +31,13 @@
 #include <asm/io.h>
 #include <linux/fs.h>
 #include <linux/cdev.h>
+#include <linux/version.h>
 
 #include "at91_adc.h"
 
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,37)
+#define USE_UNLOCKED_IOCTL
+#endif
 
 static void at91_adc_device_release(struct device *dev){}
 struct platform_device at91_adc_device = {
@@ -115,9 +119,16 @@
 //////////////////////////////////////////////////////
 // IOCTL interface
 //////////////////////////////////////////////////////
-static int at91_adc_ioctl(
-  struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg
-){
+
+#ifdef USE_UNLOCKED_IOCTL
+static long
+at91_adc_ioctl(struct file * file, unsigned int cmd, unsigned long arg)
+#else
+static int
+at91_adc_ioctl(struct inode * inode, struct file * file, unsigned int cmd,
+               unsigned long arg)
+#endif
+{
   int retval = 0;
   switch (cmd) {
     case ADC_READ:
@@ -128,9 +139,14 @@
   }
   return retval;
 }
+
 struct file_operations at91_adc_fops = {
   .owner = THIS_MODULE,
+#ifdef USE_UNLOCKED_IOCTL
+  .unlocked_ioctl = at91_adc_ioctl,
+#else
   .ioctl = at91_adc_ioctl,
+#endif
 };
 
 static void at91_adc_cdev_teardown(void){