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Many lustre modules depend on libcfs having initialized properly, but do not explicit check that it did. When lustre is built as discrete modules, this does not cause a problem because if the libcfs module fails initialization, the other modules don't even get loaded. When lustre is compiled into the kernel, all module_init() routines get run, so they need to check the required initialization succeeded. This patch splits out the initialization of libcfs into a new libcfs_setup(), and has all modules call that. The misc_register() call is kept separate as it does not allocate any resources and if it fails, it fails hard - no point in retrying. Other set-up allocates resources and so is best delayed until they are needed, and can be worth retrying. Ideally, the initialization would happen at mount time (or similar) rather than at load time. Doing this requires each module to check dependencies when they are activated rather than when they are loaded. Achieving that is a much larger job that would have to progress in stages. For now, this change ensures that if some initialization in libcfs fails, other modules will fail-safe. Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.