libbpf

Syncing latest libbpf commits from kernel repository.
Baseline bpf-next commit:   3db1a3fa98808aa90f95ec3e0fa2fc7abf28f5c9
Checkpoint bpf-next commit: 7afa94efb6bb9f651d58c3ea7d6850422cc46807
Baseline bpf commit:        1a3449c19407a28f7019a887cdf0d6ba2444751a
Checkpoint bpf commit:      7afa94efb6bb9f651d58c3ea7d6850422cc46807

Andrii Nakryiko (1):
  libbpf: Allow loading empty BTFs

Luis Gerhorst (8):
  bpftask: return exit code
  bpf_task_syscall_0 boilerplate
  Implement bpf helpers in syscalls definitions
  Get return value from autogenerated getpid
  BPF_FUNC: allow non-continuous syscall numbers
  bpf: Add task_write_user helper
  bpftask: enable access to mmap allocations
  Add bpftask_syscalls.h to uapi

 include/uapi/linux/bpf.h | 22 ++++++++++++++++++++++
 src/btf.c                |  5 -----
 src/libbpf.c             |  1 +
 src/libbpf_probes.c      |  1 +
 4 files changed, 24 insertions(+), 5 deletions(-)

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2.20.1