tree c10910f65477d1b9f9620820460310c88634f8e9
parent d937c813f88d727ea9d34a7768264a64c8b93025
author Phillip Lougher <phillip@squashfs.org.uk> 1724369466 +0100
committer Christian Brauner <brauner@kernel.org> 1724411496 +0200
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Squashfs: Ensure all readahead pages have been used

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>