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13acb508ae
Move BTF ID determination for BPF_PROG_TYPE_TRACING programs to a load phase. Performing it at open step is inconvenient, because it prevents BPF skeleton generation on older host kernel, which doesn't contain BTF_KIND_FUNCs information in vmlinux BTF. This is a common set up, though, when, e.g., selftests are compiled on older host kernel, but the test program itself is executed in qemu VM with bleeding edge kernel. Having this BTF searching performed at load time allows to successfully use bpf_object__open() for codegen and inspection of BPF object file. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20191214014341.3442258-11-andriin@fb.com |
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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 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.