diff --git a/include/linux/head.h b/include/linux/head.h
new file mode 100644
index 0000000..db3dda2
--- /dev/null
+++ b/include/linux/head.h
@@ -0,0 +1,20 @@
+#ifndef _HEAD_H
+#define _HEAD_H
+
+typedef struct desc_struct {
+	unsigned long a,b;
+} desc_table[256];
+
+extern unsigned long pg_dir[1024];
+extern desc_table idt,gdt;
+
+#define GDT_NUL 0
+#define GDT_CODE 1
+#define GDT_DATA 2
+#define GDT_TMP 3
+
+#define LDT_NUL 0
+#define LDT_CODE 1
+#define LDT_DATA 2
+
+#endif