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[ Upstream commit 92f1d3b40179b15630d72e2c6e4e25a899b67ba9 ] The maximum of the ftrace hash bits is made fls(32) in register_ftrace_direct(), which seems illogical. So, we fix it by making the max hash bits FTRACE_HASH_MAX_BITS instead. Link: https://lore.kernel.org/20250413014444.36724-1-dongml2@chinatelecom.cn Fixes: d05cb470663a ("ftrace: Fix modification of direct_function hash while in use") Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Sasha Levin <sashal@kernel.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.