--- zzzz-none-000/linux-5.4.213/include/uapi/linux/fcntl.h	2022-09-15 10:04:56.000000000 +0000
+++ miami-7690-761/linux-5.4.213/include/uapi/linux/fcntl.h	2024-05-29 11:20:02.000000000 +0000
@@ -93,5 +93,9 @@
 
 #define AT_RECURSIVE		0x8000	/* Apply to the entire subtree */
 
+/* Flags for name_to_handle_at(2). We reuse AT_ flag space to save bits... */
+#define AT_HANDLE_FID		AT_REMOVEDIR	/* file handle is needed to
+					compare object identity and may not
+					be usable to open_by_handle_at(2) */
 
 #endif /* _UAPI_LINUX_FCNTL_H */