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The function scrub_raid56_parity_stripe() is handling the parity stripe by the following steps: - Scrub each data stripes And make sure everything is fine in each data stripe - Cache the data stripe into the raid bio - Use the cached raid bio to scrub the target parity stripe Extract the last two steps into a new helper, scrub_raid56_cached_parity(), as a cleanup and make the error handling more straightforward. With the following minor cleanups: - Use on-stack bio structure The bio is always empty thus we do not need any bio vector nor the block device. Thus there is no need to allocate a bio, the on-stack one is more than enough to cut it. - Remove the unnecessary btrfs_put_bioc() call if btrfs_map_block() failed If btrfs_map_block() is failed, @bioc_ret will not be touched thus there is no need to call btrfs_put_bioc() in this case. - Use a proper out: tag to do the cleanup Now the error cleanup is much shorter and simpler, just btrfs_bio_counter_dec() and bio_uninit(). 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.