78429edfee
container_of() only returns NULL if the passed pointer is NULL _and_ if the embedded element is the first element of the structure. Even if that is the case, testing against it is misleading and possibly dangerous because the position of the embedded element may change. In this case, the check is unnecessary since it is known that file->private_data is never NULL for an open file, and container_of() will therefore also never be NULL. Drop the check. Acked-by: Dragan Cvetic <dragan.cvetic@xilinx.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20210521200457.2112041-1-linux@roeck-us.net 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.
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.