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Inside functions unlock_delalloc_folio() and lock_delalloc_folios(), we have the following early exits: if (index == locked_folio->index && end_index == index) return; This allows us to exit early if the range is inside the same locked folio. However the current check relies on page sized folios, if we have a large folio that contains @index but not at @index, then the early exit will no longer trigger. Furthermore without the above early check, the existing code can handle it well, as both __process_folios_contig() and lock_delalloc_folios() will skip any folio page lock/unlock if it's on the locked folio. Here we remove the early exits and let the existing code handle the same index case, to make the code a little simpler. Reviewed-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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.