a0a5472ad8
When doing backref walking to determine if an extent is shared, we are testing if the inode number, stored in the 'inum' field of struct share_check, is 0. However that can never be case, since the all instances of the structure are created at btrfs_is_data_extent_shared(), which always initializes it with the inode number from a fs tree (and the number for any inode from any tree can never be 0). So remove the checks. Signed-off-by: Filipe Manana <fdmanana@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.