On 2015-04-21 22:32, Linus Torvalds wrote:
> On Tue, Apr 21, 2015 at 6:54 PM, Andy Lutomirski <luto@amacapital.net> wrote:
>>
>> If kdbus were a general purpose IPC tool
>
>   .. but it's not ..
>

Except, IIRC, that was one of the stated design goals in the original 
patch set.  I'm pretty sure that i remember a rather verbose exposition 
that pretty much could be summarized as "Linux has no general purpose 
IPC in the kernel, this fixes that"