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87b8e9d06e
At balance_level(), when trying to promote a child node to a root node, if we fail to read the child we call btrfs_handle_fs_error(), which turns the fs to RO mode and sets it to error state as well, causing any ongoing transaction to abort. This however is not necessary because at that point we have not made any change yet at balance_level(), so any error reading the child node does not leaves us in any inconsistent state. Therefore we can just return the error to the caller. Reviewed-by: Qu Wenruo <wqu@suse.com> Signed-off-by: Filipe Manana <fdmanana@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.