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David Sterba
44a6c3437a
Handle the lookup failure of the block group to unpin, this is a logic error as the block group must exist at this point. If not, something else must have freed it, like clean_pinned_extents() would do without locking the unused_bg_unpin_mutex. Push the errors to the callers, proper handling will be done in followup patches. 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.