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d59232afb0
ARG_PTR_TO_KPTR is currently only used by the bpf_kptr_xchg helper. Although it limits reg types for that helper's first arg to PTR_TO_MAP_VALUE, any arbitrary mapval won't do: further custom verification logic ensures that the mapval reg being xchgd-into is pointing to a kptr field. If this is not the case, it's not safe to xchg into that reg's pointee. Let's rename the bpf_arg_type to more accurately describe the fairly specific expectations that this arg type encodes. This is a nonfunctional change. Acked-by: Martin KaFai Lau <martin.lau@kernel.org> Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com> Signed-off-by: Amery Hung <amery.hung@bytedance.com> Link: https://lore.kernel.org/r/20240813212424.2871455-4-amery.hung@bytedance.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.