diff --git a/arch/s390/include/asm/purgatory.h b/arch/s390/include/asm/purgatory.h
index e297bcfc476f65d0c41e591b9df9f43754b03aa7..6090670df51fcee21b2523fc388ba93ca5510cb0 100644
--- a/arch/s390/include/asm/purgatory.h
+++ b/arch/s390/include/asm/purgatory.h
@@ -13,5 +13,11 @@
 
 int verify_sha256_digest(void);
 
+extern u64 kernel_entry;
+extern u64 kernel_type;
+
+extern u64 crash_start;
+extern u64 crash_size;
+
 #endif	/* __ASSEMBLY__ */
 #endif /* _S390_PURGATORY_H_ */