I've converted my comments but I'd like to point out that libosmocore does not actually follow this style - just do git grep -n "//"|grep -v http to verify.
There is a _LOT_ less // than /* */ style comments.
bash$ git grep -n "/*"|grep -v http | grep -v git | grep -v \.in | grep -v rules | wc -l 4859 bash$ git grep -n "//"|grep -v http | grep -v git | grep -v \.in | grep -v rules | wc -l 26
Just because a few slipped by the review in previous merges doesn't mean it should be encouraged.
Also not that among those few, only 2 of them are actually comments really, the others are deactivated code that really should have been removed instead of commented.
Cheers,
Sylvain