Error compiling kernel modules: "usb_port_suspend" undefined

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Alright, maybe I'm an idiot, but I cloned the parallella-linux repository and successfully built a kernel.

Unfortunately, this hasn't solved my problem because in the process, the kernel I built would not boot. After restoring the original kernel, it seems that the modules I compiled and installed are preventing the original kernel from booting, as well.

So, I'm stuck with the stock kernel for now. I plan to re-compile the kernel with Parallella defaults, and add modules one-by-one in the hopes that I can successfully build a working kernel. If anyone has any ideas, I welcome any input you have.

Thanks.