Move the existing client layout into a private header and link
separate suites with shared fixtures. Add task-scoped usercopy and
allocation boundaries around the actual ioctl and timeout paths.
Use private clients without scheduling work or accessing userspace
memory. Preserve payload validation and counter behavior; the
delivered-timeout assertion exposes the existing double decrement.
Include the private event headers needed by ordinary in-tree builds
in generated kernel patches.
Gleb Chesnokov
bc20ee1ca1