const compress/flate.hashMask

4 uses

	compress/flate (current package)
		deflate.go#L54: 	hashMask            = (1 << hashBits) - 1
		deflate.go#L217: 			hh := &d.hashHead[newH&hashMask]
		deflate.go#L426: 			hh := &d.hashHead[d.hash&hashMask]
		deflate.go#L474: 						hh := &d.hashHead[d.hash&hashMask]