What is a -ckt mainline kernel?

I just saw v3.16.7-ckt1-utopic on http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D and found a related anouncement promising information about -ckt kernels in the ExtendedStable kernel article of the Ubuntu wiki. I don't find any mention of what a -ckt kernel is (substring isn't contained in the wiki article) except if the reference from the announcement means that -ckt is an extended-stable-kernel (feels like too many corners to think around to make the connection to the suffix). Why would v3.16.7-ckt1-utopic be the only -ckt kernel then?

What does -ckt in the version mean?

Solution 1:

"Canonical Kernel Team".

Found it on the debian mailing list and it also explains why 3.16 is the only kernel at the moment that has it.

In addition, I would like to announce a change in the kernel numbering scheme that we will be using: we are adding the string '-ckt' ('Canonical Kernel Team') to the kernel version. So, for example, kernel '3.16.7.1' becomes '3.16.7-ckt1'.

Note that this change applies only to the 3.16 kernel, although in the future we may consider doing it for other kernels we are currently maintaining.

Cheers, -- Luís