Messages in this thread | | | Subject | Re: Migrating to larger numbers | Date | Sun, 30 May 1999 16:59:59 +0100 (BST) | From | Alan Cox <> |
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> > The above code does not rely on any particular number. > > It just says that if the device number fits into 16 bits > > then it is partitioned into major and minor in a particular way, > > and if not it is partitioned in some other way. > > And so how do you distinguish between (0,2000) and (7,208)?
If you switch to say 16:16 then you need a legacy device. (For the more sensible seeming 20:12 you need 4). These map old numbers onto new. Conceptually 0:something is a multiplexor device for legacy device nodes.
Alan
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