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This patch is being sent for use in the various Rust GPU drivers that are under development. It provides the additional feature of work items that are executed after a delay. The design of the existing workqueue is rather extensible, as most of the logic is reused for delayed work items even though a different work item type is required. The new logic consists of: * A new DelayedWork struct that wraps struct delayed_work. * A new impl_has_delayed_work! macro that provides adjusted versions of the container_of logic, that is suitable with delayed work items. * A `enqueue_delayed` method that can enqueue a delayed work item. This patch does *not* rely on the fact that `struct delayed_work` contains `struct work_struct` at offset zero. It will continue to work even if the layout is changed to hold the `work` field at a different offset. Please see the example introduced at the top of the file for example usage of delayed work items. Acked-by: Tejun Heo <tj@kernel.org> Reviewed-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Link: https://lore.kernel.org/r/20250711-workqueue-delay-v3-1-3fe17b18b9d1@google.com [ Replaced `as _` with `as ffi::c_int` to clean warning. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.