article on writting OpenSolaris device drivers is targeted at Linux driver developers. It has been around for a while but I just found it today. Really interesting reading. Personally I've only ever written/hacked on Solaris device drivers but this looks like quite a complete guide to help people port Linux drivers or write drivers from scratch if they are familiar with Linux.
I think it would be really helpful to have a similar guide for \*BSD and MacOS X.
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