const golang.org/x/sys/unix.MNT_ID_REQ_SIZE_VER1

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux.go#L1957: 	MNT_ID_REQ_SIZE_VER1                        = 0x20

The pages are generated with Golds v0.7.6. (GOOS=linux GOARCH=amd64)