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

one use

	golang.org/x/sys/unix (current package)
		ztypes_linux.go#L1019: 	PerfBitDisabled               uint64 = CBitFieldMaskBit0

The pages are generated with Golds v0.4.9. (GOOS=linux GOARCH=amd64)