Discussing the latest breakage of the linux-next tree, Stephen Rothwell noted that the problem went unnoticed due to the arm tree not currently being included, "this is why I would have liked you to participate in the linux-next tree ...".

Arm maintainer Russell King questioned the usefulness, saying, "linux-next will not give me anything which -mm isn't giving me. As I said in the discussion, linux-next value is _very_ small for me. Sorry but true." Several stepped in to offer some reasons that the linux-next tree is useful.

Andrew Morton noted, "putting arm into linux-next means that Stephen (and git) handle the merges rather than having me (and not-git) do it. Which helps me. I expect that linux-next will get a lot more cross-compilation testing than -mm. Which helps you."

More Here