[Q] How to enable logcat into kernel

Hi guys,
I'm trying to compile CARBON rom for gtab2 p51XX,

i do have a blackscreen, but adb recognize my device, so when i do an adb logcat i have
"Unable to open log device '/dev/log/main': No such file or directory"

I googled around and found that it's disabled in kernel, but can't find how to enable it.

Could you head me in the right direction?

Thanks