Messages in this thread | | | From | Segher Boessenkool <> | Subject | Re: [LinuxBIOS] [linux-usb-devel] [RFC][PATCH 0/2] x86_64 Early usb debug port support. | Date | Wed, 6 Dec 2006 16:31:36 +0100 |
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>> What do you mean by >> + for (reps = 0; reps >= 0; reps++) { >> ? > > If you will not reps is negative. Roughly it is a loop > that will timeout eventually if a usb debug cable is not present.
> So since I didn't know how many loop iterations made sense I allowed > it to loop for 2^31 times or until reps goes negative.
This doesn't work however. Signed overflow in C is undefined, and GCC actually optimises accordingly (unless -fwrapv is used).
Segher
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