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In the recent work to remove page->index, a sanity check that ensured all the readhead pages were covered by the Squashfs data block was removed [1]. To avoid any regression, this commit adds the sanity check back in an equivalent way. Namely the page actor will now return error if any pages are unused after completion. [1] https://lore.kernel.org/all/20240818235847.170468-3-phillip@squashfs.org.uk/ -- Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk> Link: https://lore.kernel.org/r/20240822233106.121522-1-phillip@squashfs.org.uk V3: last_page should be actor->last_page Signed-off-by: Christian Brauner <brauner@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.