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

Alexei Starovoitov says:

====================
pull-request: bpf-next 2020-09-23

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

We've added 95 non-merge commits during the last 22 day(s) which contain
a total of 124 files changed, 4211 insertions(+), 2040 deletions(-).

The main changes are:

1) Full multi function support in libbpf, from Andrii.

2) Refactoring of function argument checks, from Lorenz.

3) Make bpf_tail_call compatible with functions (subprograms), from Maciej.

4) Program metadata support, from YiFei.

5) bpf iterator optimizations, from Yonghong.
====================

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

diff --cc Makefile
Simple merge

diff --cc include/linux/filter.h
Simple merge

diff --cc include/net/tcp.h
Simple merge

diff --cc kernel/bpf/syscall.c
Simple merge

diff --cc kernel/bpf/verifier.c
Simple merge

diff --cc net/core/dev.c
Simple merge

diff --cc net/core/filter.c
Simple merge

diff --cc net/ipv4/tcp.c
Simple merge

diff --cc net/ipv4/tcp_input.c
Simple merge

diff --cc tools/bpf/resolve_btfids/Makefile
Simple merge

diff --cc tools/lib/bpf/libbpf.c
Simple merge