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646f01ccdd
Add two test cases that test the new ftrace direct functionality if the ftrace-direct sample module is available. One test case tests against each available tracer (function, function_graph, mmiotrace, etc), and the other test tests against a kprobe at the same location as the direct caller. Both tests follow the same pattern of testing combinations: enable test (either the tracer or the kprobe) load direct function module unload direct function module disable test enable test load direct function module disable test unload direct function module load direct function module enable test disable test unload direct function module load direct function module enable test unload direct function module disable test As most the bugs in development happened with various ways of enabling or disabling the direct calls with function tracer in one of these combinations. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.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.