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ab6eac7c91
The function btrfs_folio_end_all_writers() is only utilized in extent_writepage() as a way to unlock all subpage range (for both successful submission and error handling). Meanwhile we have a similar function, btrfs_folio_end_writer_lock(). The difference is, btrfs_folio_end_writer_lock() expects a range that is a subset of the already locked range. This limit on btrfs_folio_end_writer_lock() is a little overkilled, preventing it from being utilized for error paths. So here we enhance btrfs_folio_end_writer_lock() to accept a superset of the locked range, and only end the locked subset. This means we can replace btrfs_folio_end_all_writers() with btrfs_folio_end_writer_lock() instead. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@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.