7d5fda1c84
When an event probe is to be removed via the API that created it via the dynamic events, an -ENOENT error is returned. This is because the removal of the event probe does not expect to see the event system and name that the event probe is attached to, even though that's part of the API to create it. As the removal of probes is to use the same API as they are created. In fact, the removal is not consistent with the kprobes and uprobes removal. Fix that by allowing various ways to remove the eprobe. The eprobe is created with: e:[GROUP/]NAME SYSTEM/EVENT [OPTIONS] Have it get removed by echoing in the following into dynamic_events: # Remove all eprobes with NAME echo '-:NAME' >> dynamic_events # Remove a specific eprobe echo '-:GROUP/NAME' >> dynamic_events echo '-:GROUP/NAME SYSTEM/EVENT' >> dynamic_events echo '-:NAME SYSTEM/EVENT' >> dynamic_events echo '-:GROUP/NAME SYSTEM/EVENT OPTIONS' >> dynamic_events echo '-:NAME SYSTEM/EVENT OPTIONS' >> dynamic_events Link: https://lkml.kernel.org/r/20211012081925.0e19cc4f@gandalf.local.home Link: https://lkml.kernel.org/r/20211013205533.630722129@goodmis.org Suggested-by: Masami Hiramatsu <mhiramat@kernel.org> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Fixes: 7491e2c442781 ("tracing: Add a probe that attaches to trace events") 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.