[$] Toward a kernel maintainer's guide

'Who's on Team Xmas Tree?' asked Dan Williams at the beginning of his talk
in the Kernel Summit track of the 2018
Linux Plumbers Conference. He
was referring to a rule for the ordering of local variable declarations
within functions that is enforced by a minority of kernel subsystem
maintainers — one of many examples of 'local customs' that can surprise
developers when they submit patches to subsystems where they are not
accustomed to working. Documenting these varying practices is a small part
of Williams's project to create a kernel maintainer's manual, but it seems
to be where the effort is likely to start.