Global USE flag

Build the kernel modules

Packages describing “modules” as local USE flag

Package “modules” Flag Description
dev-util/sysdig Build kernel modules needed for tracing local events. Disable this only if you intend to use sysdig purely to work with dumpfiles.
media-gfx/graphicsmagick Compile graphicsmagick with dynamically loadable modules
net-fs/openafs Build libafs kernel module. Disable only if you know what you're doing: without this module OpenAFS client will not work.