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

Alexei Starovoitov says:

====================
pull-request: bpf 2021-03-20

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

We've added 5 non-merge commits during the last 3 day(s) which contain
a total of 8 files changed, 155 insertions(+), 12 deletions(-).

The main changes are:

1) Use correct nops in fexit trampoline, from Stanislav.

2) Fix BTF dump, from Jean-Philippe.

3) Fix umd memory leak, from Zqiang.
====================

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