After the Security Breach on Kernel.org, the site is down for Maintenance. Check the screen shot below.
You can still download the Linux Kernel source from Linus Torvalds github.
To Download Click Here.
For Jeremy Fitzhardinge xen kernel Click Here.
The Site is online now but its not working fine, we can’t download the kernel source. When you click the download link you will be getting the following error.
The requested URL /pub/linux/kernel/v3.0/linux-3.0.4.tar.bz2 was not found on this server.
Hope this will be helpful for you!!!