On Fri, 14 Dec 2018 18:35:28 +0100 Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@xxxxxxxxxx> wrote: > As per Documentation/process/submitting-patches, Co-developed-by is a > valid signature. > I'm with Joe - I find this tag kinda useless and duplicative. But whatever. But as the documentation says, Co-developed-by must be accompanied by a Signed-off-by:. It would be helpful if checkpatch were to detect a failure to do this.