Merge branch 'ebpf-samples-cross-compile'

Joel Fernandes says:

====================
Add cross-compilation support to eBPF samples

These patches fix issues seen when cross-compiling eBPF samples on arm64.
Compared to [1], I dropped the controversial inline-asm patch and exploring
other options to fix it. However these patches are a step in the right
direction and I look forward to getting them into -next and the merge window.

Changes since v3:
- just a repost with acks

[1] https://lkml.org/lkml/2017/8/7/417


====================

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