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

Merge https://git./linux/kernel/git/bpf/bpf-next

Daniel Borkmann says:

====================
pull-request: bpf-next 2021-04-28

The main changes are:

1) Add link detach and following re-attach for trampolines, from Jiri Olsa.

2) Use kernel's "binary printf" lib for formatted output BPF helpers (which
   avoids the needs for variadic argument handling), from Florent Revest.

3) Fix verifier 64 to 32 bit min/max bound propagation, from Daniel Borkmann.

4) Convert cpumap to use netif_receive_skb_list(), from Lorenzo Bianconi.

5) Add generic batched-ops support to percpu array map, from Pedro Tammela.

6) Various CO-RE relocation BPF selftests fixes, from Andrii Nakryiko.

7) Misc doc rst fixes, from Hengqi Chen.

* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next:
  bpf, selftests: Update array map tests for per-cpu batched ops
  bpf: Add batched ops support for percpu array
  bpf: Implement formatted output helpers with bstr_printf
  seq_file: Add a seq_bprintf function
  bpf, docs: Fix literal block for example code
  bpf, cpumap: Bulk skb using netif_receive_skb_list
  bpf: Fix propagation of 32 bit unsigned bounds from 64 bit bounds
  bpf: Lock bpf_trace_printk's tmp buf before it is written to
  selftests/bpf: Fix core_reloc test runner
  selftests/bpf: Fix field existence CO-RE reloc tests
  selftests/bpf: Fix BPF_CORE_READ_BITFIELD() macro
  libbpf: Support BTF_KIND_FLOAT during type compatibility checks in CO-RE
  selftests/bpf: Add remaining ASSERT_xxx() variants
  selftests/bpf: Use ASSERT macros in lsm test
  selftests/bpf: Test that module can't be unloaded with attached trampoline
  selftests/bpf: Add re-attach test to lsm test
  selftests/bpf: Add re-attach test to fexit_test
  selftests/bpf: Add re-attach test to fentry_test
  bpf: Allow trampoline re-attach for tracing and lsm programs
====================

Link: https://lore.kernel.org/r/20210427233740.22238-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>