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Before I send you on your way to go out into the world and write kernel modules, there are a few things I need to warn you about. If I fail to warn you and something bad happens, please report the problem to me for a full refund of the amount I was paid for your copy of the book.
- Using standard libraries
You can't do that. In a kernel module you can only use kernel functions, which are the functions you can see in
- Disabling interrupts
You might need to do this for a short time and that is OK, but if you don't enable them afterwards, your system will be stuck and you'll have to power it off.
- Sticking your head inside a large carnivore
I probably don't have to warn you about this, but I figured I will anyway, just in case.