Messages in this thread | | | Date | Thu, 25 Oct 2001 02:29:56 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [RFC] New Driver Model for 2.5 |
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On 25 Oct 2001, Eric W. Biederman wrote: > > Or another fun common one. To shut down the interrupt controller, I first > need to shut down every device that thinks it can generate interrupts. > But my interrupt controller is way out on my pci->isa bridge. So I > can't shut that device down. > > Sorry this whole device tree idea for shutdown ordering doesn't seem > to match my idea of reality.
Your _examples_ do not match any reality.
Don't worry about things like the CPU shutdown: you have to have special code for it anyway.
Let's face it, the device tree is for _devices_. It's for shutting down a network card before we shut down the PCI bridge that is in front of it.
The issue of "core shutdown" is not covered - and isn't _meant_ to be covered. That's the problem of the architecture-specific code. There is no point in having a device tree for that, because it's going to be very much architecture-specific anyway (ie on x86 we may have to just blindly trust some silly APCI table data etc).
Linus
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