What decision? I only see something about Patch 6 and Patch 7: Antonio Quartulli doesn't want rtnetlink support in batman-adv. I don't see any other statement about the rest of the patchset.
Quoting Antonio:
Anyway, I discussed about this together with the others and it seems that a proper solution now is to wait before merging this patchset and fix the current sysfs/rtnl_lock problem first. What do you think?
Adding a new API without fixing the current one doesn't sound like a good move. <<<
What isn't clear ?
AFAIK patch 6 and 7 are the "new" rtnetlink API. The rest can be categorized as fixes for bugs and for the wrong way to implementation things. But I've discussed it with the others and now we found out: batman-adv doesn't care about the rest of the kernel and bugs are not relevant compared to egocentric statements.