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

Alexei Starovoitov says:

====================
pull-request: bpf 2022-03-29

We've added 16 non-merge commits during the last 1 day(s) which contain
a total of 24 files changed, 354 insertions(+), 187 deletions(-).

The main changes are:

1) x86 specific bits of fprobe/rethook, from Masami and Peter.

2) ice/xsk fixes, from Maciej and Magnus.

3) Various small fixes, from Andrii, Yonghong, Geliang and others.

* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
  selftests/bpf: Fix clang compilation errors
  ice: xsk: Fix indexing in ice_tx_xsk_pool()
  ice: xsk: Stop Rx processing when ntc catches ntu
  ice: xsk: Eliminate unnecessary loop iteration
  xsk: Do not write NULL in SW ring at allocation failure
  x86,kprobes: Fix optprobe trampoline to generate complete pt_regs
  x86,rethook: Fix arch_rethook_trampoline() to generate a complete pt_regs
  x86,rethook,kprobes: Replace kretprobe with rethook on x86
  kprobes: Use rethook for kretprobe if possible
  bpftool: Fix generated code in codegen_asserts
  selftests/bpf: fix selftest after random: Urandom_read tracepoint removal
  bpf: Fix maximum permitted number of arguments check
  bpf: Sync comments for bpf_get_stack
  fprobe: Fix sparse warning for acccessing __rcu ftrace_hash
  fprobe: Fix smatch type mismatch warning
  bpf/bpftool: Add unprivileged_bpf_disabled check against value of 2
====================

Link: https://lore.kernel.org/r/20220329234924.39053-1-alexei.starovoitov@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>