Running
# ./scripts/get_maintainer.pl -f block/blk-cgroup.c
Tejun Heo <tj@xxxxxxxxxx> (unknown:CONTROL GROUP - BLOCK IO CONTROLLER
(BLKIO))
Josef Bacik <josef@xxxxxxxxxxxxxx> (unknown:CONTROL GROUP - BLOCK IO
CONTROLLER (BLKIO))
Jens Axboe <axboe@xxxxxxxxx> (unknown:CONTROL GROUP - BLOCK IO
CONTROLLER (BLKIO))
cgroups@xxxxxxxxxxxxxxx (open list:CONTROL GROUP - BLOCK IO CONTROLLER
(BLKIO))
linux-block@xxxxxxxxxxxxxxx (open list:CONTROL GROUP - BLOCK IO
CONTROLLER (BLKIO))
linux-kernel@xxxxxxxxxxxxxxx (open list)
shows "unknown" instead of "maintainer" or "supporter". Is it
intentional?