HEADSUP: Change of Makedev() Semantics on FreeBSD

Dan writes "FreeBSD's Poul-Henning Kamp is in the process of adding ref-counting and locking to dev_t, and would very much prefer if this step is completed soon before 5-STABLE gets branched. He says that all this will be transparent to the majority of device drivers, as the refcounting will happen in the make_dev() and destroy_dev() family of calls and normal drivers need not know more about it."