diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 38b6442..efe79c1 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -274,6 +274,8 @@ extern long strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count);
 #endif
 
 #ifdef CONFIG_HARDENED_USERCOPY
+void usercopy_warn(const char *name, const char *detail, bool to_user,
+		   unsigned long offset, unsigned long len);
 void __noreturn usercopy_abort(const char *name, const char *detail,
 			       bool to_user, unsigned long offset,
 			       unsigned long len);