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Notifies user-space event loops whether a device is readable or writable without blocking, supporting poll, select, and epoll.
Distinct from Device Drivers: Distinct from Device Drivers: focuses on poll/select/epoll readiness reporting, not general driver implementation.
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The Linux Kernel Module Programming Guide is an educational resource that teaches how to write, compile, and manage loadable kernel modules for modern Linux kernels. It covers the complete lifecycle of kernel modules, from building and loading to unloading and debugging, with a focus on extending kernel functionality without recompiling the entire kernel. The guide provides comprehensive coverage of core kernel programming concepts including dynamic module loading, file-operation registration, interrupt handling, kernel-user data copying, concurrency control, and deferred task scheduling. It
Teaches how to implement poll, select, and epoll support for device readiness reporting.