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commitf6d026eea3upstream. The writing operation return the count of writes regardless of whether events are enabled or disabled. Switch it to return -EBADF to indicates that the event is disabled. Link: https://lkml.kernel.org/r/20230626111344.19136-2-sunliming@kylinos.cn Cc: stable@vger.kernel.org7f5a08c79d("user_events: Add minimal support for trace_event into ftrace") Acked-by: Beau Belgrave <beaub@linux.microsoft.com> Signed-off-by: sunliming <sunliming@kylinos.cn> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> 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.