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863aab3d4d
Show the rejected function name when attaching tracing programs to functions in deny list. With this change, we know why tracing programs can't attach to functions like __rcu_read_lock() from log. $ ./fentry libbpf: prog '__rcu_read_lock': BPF program load failed: -EINVAL libbpf: prog '__rcu_read_lock': -- BEGIN PROG LOAD LOG -- Attaching tracing programs to function '__rcu_read_lock' is rejected. Suggested-by: Leon Hwang <leon.hwang@linux.dev> Signed-off-by: KaFai Wan <kafai.wan@linux.dev> Acked-by: Yafang Shao <laoar.shao@gmail.com> Acked-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20250724151454.499040-3-kafai.wan@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.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.