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Objtool warnings can be indicative of crashes, broken live patching, or even boot failures. Ignoring them is not recommended. Add CONFIG_OBJTOOL_WERROR to upgrade objtool warnings to errors by enabling the objtool --Werror option. Also set --backtrace to print the branches leading up to the warning, which can help considerably when debugging certain warnings. To avoid breaking bots too badly for now, make it the default for real world builds only (!COMPILE_TEST). Co-developed-by: Brendan Jackman <jackmanb@google.com> Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/3e7c109313ff15da6c80788965cc7450115b0196.1741975349.git.jpoimboe@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 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.