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Chengguang Xu
50c15df69e
ext4_xattr_destroy_cache() can handle NULL pointer correctly, so there is no need to check NULL pointer before calling ext4_xattr_destroy_cache(). Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Chengguang Xu <cgxu519@gmx.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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.