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ad5d6e9148
At free_extent_map(), it's pointless to have a WARN_ON() to check if the refcount of the extent map is zero. Such check is already done by the refcount_t module and refcount_dec_and_test(), which loudly complains if we try to decrement a reference count that is currently 0. The WARN_ON() dates back to the time when used a regular atomic_t type for the reference counter, before we switched to the refcount_t type. The main goal of the refcount_t type/module is precisely to catch such types of bugs and loudly complain if they happen. Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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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.