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AMD_IOMMU module is missing from slackware kernels

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http://www.linuxquestions.org – Slackware kernels do not include the amd iommu module. This causes io-remapping to fail and many devices may be unusable. For me, usb devices (kbd/mouse/storage) and my ethernet cards were unusable (perhaps other devices that I didn't notice as well). Recompiling the kernel with CONFIG_AMD_IOMMU=y fixed this. I started with the config for the slackware generic kernel, then made my change in 'make menuconfig'. This is meant to help others who run into a similar situtation as my own. Symptoms to watch for are usb devices being unresponsive when get started with installation. To complete the ins (HowTos)