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

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux.go#L677: 	CAN_SFF_ID_BITS                             = 0xb

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