Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Daniel Borkmann says:

====================
pull-request: bpf-next 2018-03-03

The following pull-request contains BPF updates for your *net-next* tree.

The main changes are:

1) Extend bpftool to build up CFG information of eBPF programs and add an
   option to dump this in DOT format such that this can later be used with
   DOT graphic tools (xdot, graphviz, etc) to visualize it. Part of the
   analysis performed is sub-program detection and basic-block partitioning,
   from Jiong.

2) Multiple enhancements for bpftool's batch mode, more specifically the
   parser now understands comments (#), continuation lines (\), and arguments
   enclosed between quotes. Also, allow to read from stdin via '-' as input
   file, all from Quentin.

3) Improve BPF kselftests by i) unifying the rlimit handling into a helper
   that is then used by all tests, and ii) add support for testing tail calls
   to test_verifier plus add tests covering all corner cases. The latter is
   especially useful for testing JITs, from Daniel.

4) Remove x64 JIT's bpf_flush_icache() since flush_icache_range() is a noop
   on x64, from Daniel.

5) Fix one more occasion in BPF samples where we do not detach the BPF program
   from the cgroup after completion, from Prashant.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>