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

Alexei Starovoitov says:

====================
pull-request: bpf 2018-12-18

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

The main changes are:

1) promote bpf_perf_event.h to mandatory UAPI header, from Masahiro.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/uapi/asm-generic/Kbuild.asm

@@ -3,6 +3,7 @@
 #
 mandatory-y += auxvec.h
 mandatory-y += bitsperlong.h
+mandatory-y += bpf_perf_event.h
 mandatory-y += byteorder.h
 mandatory-y += errno.h
 mandatory-y += fcntl.h