This set implements a kfunc called bpf_send_signal_remote() that is similar
to sigqueue() as it can send a signal along with a cookie to a thread or
thread group.

The send_signal selftest has been updated to also test this new kfunc under
all contexts.

Changes in v2:
v1: https://lore.kernel.org/bpf/20240724113944.75977-1-puranjay@kernel.org/
- Convert to a kfunc
- Add mechanism to send a cookie with the signal.

Puranjay Mohan (2):
  bpf: implement bpf_send_signal_remote() kfunc
  selftests/bpf: Augment send_signal test with remote signaling

 kernel/trace/bpf_trace.c                      |  78 +++++++++-
 .../selftests/bpf/prog_tests/send_signal.c    | 133 +++++++++++++-----
 .../bpf/progs/test_send_signal_kern.c         |  35 ++++-
 3 files changed, 207 insertions(+), 39 deletions(-)

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2.40.1