Messages in this thread |  | | Date | Mon, 9 Oct 2000 00:30:17 +0200 | From | Jamie Lokier <> | Subject | Re: Calling current() from interrupt context |
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Kenn Humborg wrote: > My feeling is that interrupt code has no business calling current(), > but I don't know the kernel well enough to be sure. Is there any > interrupt-level code that calls current() or is it a design > principle that it cannot be called?
It's a design principle that you must not call "current" in interrupt, bottom half or tasklet context. From time to time buggy code is found to do this, and it gets away with it. (See recent thread on network I/O signal delivery using the wrong credentials due to a bug like this).
So if you can make the machine crash utterly when calling "current" in irq context, or when dereferencing the result, that would probably be a good thing :-)
-- Jamie - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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