Major numbers reclaiming for make_dev/MAJOR_AUTO

[Poul-Henning Kamp]

Hi Stefan,

Your patch will work OK in a lot of settings, but there are
unfortunately also some very nasty cases where it will fail
miserably because refcounting dev_t's is not safe yet.

There are a few remaining issues to deal with before we can
properly refcount dev_t's, and that is more or less all the
places in the kernel which uses makedev().

As you may have noticed I've started evicting these from the
console related code.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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