This is the 4.4.80 stable release
This is the 4.9.41 stable release
Linux 4.13-rc4
Linux 4.9.40-rt30
Linux 4.4.79-rt92
Linux 4.4.78-rt91
Linux 4.4.77-rt90
Linux 4.4.76-rt89
Linux 4.9.39-rt29
Linux 4.9.38-rt28
Linux 4.9.37-rt27
Linux 4.9.36-rt26