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The original check for non-null "user" object was introduced by commite11fea92e1("kmsg: export printk records to the /dev/kmsg interface") when "user" could be NULL if /dev/ksmg was opened for writing. Subsequent change750afe7bab("printk: add kernel parameter to control writes to /dev/kmsg") made "user" context required for files opened for write, but didn't remove now redundant checks for it to be non-NULL. This patch removes the dead code while preserving the current logic. Signed-off-by: Stanislav Kinsburskii <stanislav.kinsburski@gmail.com> CC: Petr Mladek <pmladek@suse.com> CC: Sergey Senozhatsky <senozhatsky@chromium.org> CC: Steven Rostedt <rostedt@goodmis.org> CC: John Ogness <john.ogness@linutronix.de> CC: linux-kernel@vger.kernel.org Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Petr Mladek <pmladek@suse.com> Link: https://lore.kernel.org/r/167929571877.2810.9926967619100618792.stgit@skinsburskii.localdomain
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.