Why not compiling bcache in kernel 3.10?

[Giovanni Lenzi]

Hi,
I don't know if this is the correct place to post this question.

I downloaded the kernel 3.10 from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.10-rc1-saucy/

I installed it, rebooted to it and noticed that it does not include
bcache module..

Can I ask why? I think it will be an important piece of software that
can give ubuntu advantages over other distributions... especially for
the ubuntu server edition
It is merged upstream with linux kernel from 3.10 and it seems to be
very stable.

Do you plan to include it in the 3.10 or not?

Thanks in advance,
Giovanni