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Compiling with W=1 gives the following warning: net/sched/cls_flower.c:731:1: warning: ‘mpls_opts_policy’ defined but not used [-Wunused-const-variable=] The TCA_FLOWER_KEY_MPLS_OPTS contains a list of TCA_FLOWER_KEY_MPLS_OPTS_LSE. Therefore, the attributes all have the same type and we can't parse the list with nla_parse*() and have the attributes validated automatically using an nla_policy. fl_set_key_mpls_opts() properly verifies that all attributes in the list are TCA_FLOWER_KEY_MPLS_OPTS_LSE. Then fl_set_key_mpls_lse() uses nla_parse_nested() on all these attributes, thus verifying that they have the NLA_F_NESTED flag. So we can safely drop the mpls_opts_policy. Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.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.