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Andrii Nakryiko says: ==================== Disentangle prune and jump points in BPF verifier code. They are conceptually independent but currently coupled together. This small patch set refactors related code and make it possible to have some instruction marked as pruning or jump point independently. Besides just conceptual cleanliness, this allows to remove unnecessary jump points (saving a tiny bit of performance and memory usage, potentially), and even more importantly it allows for clean extension of special pruning points, similarly to how it's done for BPF_FUNC_timer_set_callback. This will be used by future patches implementing open-coded BPF iterators. v1->v2: - clarified path #3 commit message and a comment in the code (John); - added back mark_jmp_point() to right after subprog call to record non-linear implicit jump from BPF_EXIT to right after CALL <subprog>. ==================== 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.