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Qu Wenruo
2a979612d5
Since backref_edge is used to connect upper and lower backref nodes, and needs to access both nodes, some code can look pretty nasty: list_add_tail(&edge->list[LOWER], &cur->upper); The above code will link @cur to the LOWER side of the edge, while both "LOWER" and "upper" words show up. This can sometimes be very confusing for reader to grasp. This patch introduces a new wrapper, link_backref_edge(), to handle the linking behavior. Which also has extra ASSERT() to ensure caller won't pass wrong nodes. Also, this updates the comment of related lists of backref_node and backref_edge, to make it more clear that each list points to what. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> 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 Restructured Text 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.