On Tue, 18 Oct 2016, Johannes Berg <johan...@sipsolutions.net> wrote: > On Tue, 2016-10-18 at 15:51 +0200, Markus Heiser wrote: >> Here are my thoughts ... >> >> Every extension which is not a part of the sphinx distro brings new >> external dependencies > > I agree. > >> and the development of such extensions is IMO >> far of kernel development's scope. > > Arguably, having good documentation *is* in the scope of kernel > development. > > Also, it could be argued that shipping a module in the kernel sources > would be more reliable than having to require it being externally > installed, like the GCC plugins perhaps.
This could probably be argued either way... My view has been all along that we should prefer to use existing extensions written and maintained by others. Perhaps we (the kind of royal "we" of which I'm personally really not part of) could take on maintainership of some extensions in the interest of improving kernel documentation, but I think the goal should be that the extensions are maintained outside of the kernel tree, that the extensions are generally usable, and have a chance of attracting attention and contributions from outside of the kernel community. (Note that this doesn't preclude us from shipping the extensions in the kernel tree, as long as it's updated from the upstream, not forked.) (This is one part of me being unhappy about making it easy to run arbitrary scripts to produce documentation; those will never be generic, and we'll never be able to offload their maintenance outside of the kernel. We should not think that we have some really special needs in the kernel.) >> ATM, there are not many use cases for diagram generators, so why not >> be KISS and creating diagrams with the favorite tool only adding the >> resulting (e.g.) PNG to the Kernel's source? > > *Only* adding the PNG would be awful, I'd have to keep track of the > corresponding source elsewhere, and perhaps couldn't even GPL it > because then I couldn't distribute the PNG without corresponding > source... > > Adding the source text would really be the only practical choice, but > doing so makes it easy to mismatch things, and also very easy to use > proprietary services for it that may go away at any time, etc. Agreed. And there are other problems with attaching binaries (although I'd say we should fix them too) . BR, Jani.  http://lkml.kernel.org/r/02a78907-933d-3f61-572e-28154b16b...@redhat.com -- Jani Nikula, Intel Open Source Technology Center