On Tue, 17 May 2016, Christoph Hellwig wrote: > It's also in entirely new files and not a modification of existing code, > and it's always been clear how it is. Some of the code has been in > since Linux 4.5 with a properly clear copyright.
The problem is that the RDMA subsystem is rather more than a driver. Its a subsystem that contains drivers. Dual licensed drivers can use the features that Christoph provides. This is more infrastructure and thus GPL I thought.