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07bbe0833e
While adding comments to the function __ftrace_hash_rec_update() and trying to describe in detail what the parameter for "filter_hash" does, I realized that it basically does exactly the same thing (but differently) if it is set or not! If it is set, the idea was the ops->filter_hash was being updated, and the code should focus on the functions that are in the ops->filter_hash and add them. But it still had to pay attention to the functions in the ops->notrace_hash, to ignore them. If it was cleared, it focused on the ops->notrace_hash, and would add functions that were not in the ops->notrace_hash but would still keep functions in the "ops->filter_hash". Basically doing the same thing. In reality, the __ftrace_hash_rec_update() only needs to either remove the functions associated to the give ops (if "inc" is set) or remove them (if "inc" is cleared). It has to pay attention to both the filter_hash and notrace_hash regardless. Remove the "filter_hash" parameter from __filter_hash_rec_update() and comment the function for what it really is doing. Link: https://lore.kernel.org/linux-trace-kernel/20240605180408.691995506@goodmis.org Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Andrew Morton <akpm@linux-foundation.org> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> |
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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 reStructuredText 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.