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

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux.go#L2404: 	PERF_MEM_LVLNUM_SHIFT                       = 0x21

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