Steven Rostedt (VMware) f90658725b tracing: Make create_filter() code match the comments
The comment in create_filter() states that the passed in filter pointer
(filterp) will either be NULL or contain an error message stating why the
filter failed. But it also expects the filter pointer to point to NULL when
passed in. If it is not, the function create_filter_start() will warn and
return an error message without updating the filter pointer. This is not
what the comment states.

As we always expect the pointer to point to NULL, if it is not, trigger a
WARN_ON(), set it to NULL, and then continue the path as the rest will work
as the comment states. Also update the comment to state it must point to
NULL.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2018-07-03 18:14:40 -04:00
2018-06-30 10:47:46 -07:00
2018-07-01 11:50:16 -07:00
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2018-07-01 12:20:20 -07:00
2018-06-30 13:05:30 -07:00
2018-06-15 07:55:25 +09:00
2018-06-30 10:47:46 -07:00
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2018-06-12 13:11:26 -07:00
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2017-11-17 17:45:29 -08:00
2018-06-28 11:16:44 -07:00
2018-07-01 16:04:53 -07:00

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.
See Documentation/00-INDEX for a list of what is contained in each file.

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.
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