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8a89fff60a
Bpftool expects key for 'lookup' operations. For some map types, key should not be specified. Support looking up those map types. Before: bpftool map create /sys/fs/bpf/q type queue value 4 entries 10 name q bpftool map update pinned /sys/fs/bpf/q value 0 1 2 3 bpftool map lookup pinned /sys/fs/bpf/q Error: did not find key After: bpftool map create /sys/fs/bpf/q type queue value 4 entries 10 name q bpftool map update pinned /sys/fs/bpf/q value 0 1 2 3 bpftool map lookup pinned /sys/fs/bpf/q key: value: 00 01 02 03 Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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.