I cannot see "/dev/spidev1.0" after I run the latest image.

I downloaded the latest image and burn it into SD card, and then boot from SD card. The problem is that I cannot see “/dev/spidev1.0” and “/dev/spidev2.0” devices. When using “uname -r” to check the version, I get 3.8.13-bone70.

How do I get “/dev/spidev1.0” back?

Thanks a lot.