diff --git a/libc/kernel/uapi/xen/gntdev.h b/libc/kernel/uapi/xen/gntdev.h
index c00e5ab..89e5eb0 100644
--- a/libc/kernel/uapi/xen/gntdev.h
+++ b/libc/kernel/uapi/xen/gntdev.h
@@ -18,49 +18,51 @@
  ****************************************************************************/
 #ifndef __LINUX_PUBLIC_GNTDEV_H__
 #define __LINUX_PUBLIC_GNTDEV_H__
+#include <linux/types.h>
 struct ioctl_gntdev_grant_ref {
-  uint32_t domid;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-  uint32_t ref;
+  __u32 domid;
+  __u32 ref;
 };
 #define IOCTL_GNTDEV_MAP_GRANT_REF _IOC(_IOC_NONE, 'G', 0, sizeof(struct ioctl_gntdev_map_grant_ref))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct ioctl_gntdev_map_grant_ref {
+  __u32 count;
+  __u32 pad;
+  __u64 index;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-  uint32_t count;
-  uint32_t pad;
-  uint64_t index;
   struct ioctl_gntdev_grant_ref refs[1];
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 #define IOCTL_GNTDEV_UNMAP_GRANT_REF _IOC(_IOC_NONE, 'G', 1, sizeof(struct ioctl_gntdev_unmap_grant_ref))
 struct ioctl_gntdev_unmap_grant_ref {
-  uint64_t index;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-  uint32_t count;
-  uint32_t pad;
+  __u64 index;
+  __u32 count;
+  __u32 pad;
 };
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define IOCTL_GNTDEV_GET_OFFSET_FOR_VADDR _IOC(_IOC_NONE, 'G', 2, sizeof(struct ioctl_gntdev_get_offset_for_vaddr))
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct ioctl_gntdev_get_offset_for_vaddr {
-  uint64_t vaddr;
-  uint64_t offset;
-  uint32_t count;
+  __u64 vaddr;
+  __u64 offset;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-  uint32_t pad;
+  __u32 count;
+  __u32 pad;
 };
 #define IOCTL_GNTDEV_SET_MAX_GRANTS _IOC(_IOC_NONE, 'G', 3, sizeof(struct ioctl_gntdev_set_max_grants))
-struct ioctl_gntdev_set_max_grants {
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-  uint32_t count;
+struct ioctl_gntdev_set_max_grants {
+  __u32 count;
 };
 #define IOCTL_GNTDEV_SET_UNMAP_NOTIFY _IOC(_IOC_NONE, 'G', 7, sizeof(struct ioctl_gntdev_unmap_notify))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct ioctl_gntdev_unmap_notify {
+  __u64 index;
+  __u32 action;
+  __u32 event_channel_port;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-  uint64_t index;
-  uint32_t action;
-  uint32_t event_channel_port;
 };
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define UNMAP_NOTIFY_CLEAR_BYTE 0x1
 #define UNMAP_NOTIFY_SEND_EVENT 0x2
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */