diff --git a/include/linux/elf.h b/include/linux/elf.h
index b70d1d2..743d5c8 100644
--- a/include/linux/elf.h
+++ b/include/linux/elf.h
@@ -368,5 +368,12 @@
 
 #endif
 
+#ifndef ARCH_HAVE_EXTRA_ELF_NOTES
+static inline int arch_notes_size(void) { return 0; }
+static inline void arch_write_notes(struct file *file) { }
+
+#define ELF_CORE_EXTRA_NOTES_SIZE arch_notes_size()
+#define ELF_CORE_WRITE_EXTRA_NOTES arch_write_notes(file)
+#endif /* ARCH_HAVE_EXTRA_ELF_NOTES */
 
 #endif /* _LINUX_ELF_H */