Initial revision

include/linux/stddef.h

+#ifndef _LINUX_STDDEF_H
+#define _LINUX_STDDEF_H
+
+#undef NULL
+#if defined(__cplusplus)
+#define NULL 0
+#else
+#define NULL ((void *)0)
+#endif
+
+#ifndef _SIZE_T
+#include <linux/types.h>
+#endif
+
+#undef offsetof
+#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+
+#endif