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

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux.go#L2011: 	MS_MGC_MSK                                  = 0xffff0000

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