diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 40ce2d983b12..3e214beabbe9 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1703,8 +1703,8 @@ int __init sysctl_init(void)
 
 #ifdef CONFIG_PROC_SYSCTL
 
-static int _proc_do_string(void* data, int maxlen, int write,
-			   void __user *buffer,
+static int _proc_do_string(char *data, int maxlen, int write,
+			   char __user *buffer,
 			   size_t *lenp, loff_t *ppos)
 {
 	size_t len;
@@ -1730,7 +1730,7 @@ static int _proc_do_string(void* data, int maxlen, int write,
 			len = maxlen-1;
 		if(copy_from_user(data, buffer, len))
 			return -EFAULT;
-		((char *) data)[len] = 0;
+		data[len] = 0;
 		*ppos += *lenp;
 	} else {
 		len = strlen(data);
@@ -1748,10 +1748,10 @@ static int _proc_do_string(void* data, int maxlen, int write,
 		if (len > *lenp)
 			len = *lenp;
 		if (len)
-			if(copy_to_user(buffer, data, len))
+			if (copy_to_user(buffer, data, len))
 				return -EFAULT;
 		if (len < *lenp) {
-			if(put_user('\n', ((char __user *) buffer) + len))
+			if (put_user('\n', buffer + len))
 				return -EFAULT;
 			len++;
 		}
@@ -1781,8 +1781,8 @@ static int _proc_do_string(void* data, int maxlen, int write,
 int proc_dostring(struct ctl_table *table, int write,
 		  void __user *buffer, size_t *lenp, loff_t *ppos)
 {
-	return _proc_do_string(table->data, table->maxlen, write,
-			       buffer, lenp, ppos);
+	return _proc_do_string((char *)(table->data), table->maxlen, write,
+			       (char __user *)buffer, lenp, ppos);
 }
 
 static size_t proc_skip_spaces(char **buf)