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Andrii Nakryiko says: ==================== Move BPF_PROG, BPF_KPROBE, and BPF_KRETPROBE helper macros from private selftests helpers to public libbpf ones. These helpers are extremely helpful for writing tracing BPF applications and have been requested to be exposed for easy use (e.g., [0]). As part of this move, fix up BPF_KRETPROBE to not allow for capturing input arguments (as it's unreliable and they will be often clobbered). Also, add vmlinux.h header guard to allow multi-time inclusion, if necessary; but also to let PT_REGS_PARM do proper detection of struct pt_regs field names on x86 arch. See relevant patches for more details. [0] https://github.com/iovisor/bcc/pull/2778#issue-381642907 ==================== 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 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.