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Yafang Shao says: ==================== Attaching fexit probes to functions marked with __noreturn may lead to unpredictable behavior. To avoid this, we will reject attaching probes to such functions. Currently, there is no ideal solution, so we will hardcode a check for all __noreturn functions. Once a more robust solution is implemented, this workaround can be removed. v4->v5: - Remove unnecessary functions (Alexei) - Use BTF_ID directly (Alexei) v3->v4: https://lore.kernel.org/bpf/20250317121735.86515-1-laoar.shao@gmail.com/ - Reject also fmod_ret (Alexei) - Fix build warnings and remove unnecessary functions (Alexei) v1->v2: https://lore.kernel.org/bpf/20250223062735.3341-1-laoar.shao@gmail.com/ - keep tools/objtool/noreturns.h as is (Josh) - Add noreturns.h to objtool/sync-check.sh (Josh) - Add verbose for the reject and simplify the test case (Song) v1: https://lore.kernel.org/bpf/20250211023359.1570-1-laoar.shao@gmail.com/ ==================== Link: https://patch.msgid.link/20250318114447.75484-1-laoar.shao@gmail.com Signed-off-by: Alexei Starovoitov <ast@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.