kpatch

USE flags

• contrib - Enable contrib kpatch services files.
• dist-kernel - Enable subslot rebuilds on Distribution Kernel upgrades
• kmod - Enable a kernel module (.ko file) which provides an interface for the patch modules to register new functions for replacement.
• kpatch - Enable a command-line tool which allows a user to manage a collection of patch modules.
• kpatch-build - Enable tools which convert a source diff patch to a patch module.
• modules-sign - Cryptographically sign installed kernel modules (requires CONFIG_MODULE_SIG=y in the kernel)
• strip - Allow symbol stripping to be performed by the ebuild for special files
• test - Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently)