It's reported [1] that a task_work queued at a wrong time can prevent
freezing and make the tasks to spin in get_signal() taking 100%
of CPU. Patch 1 is a preparation. Patch 2 addresses the issue.

[1] https://github.com/systemd/systemd/issues/33626

v2: move task_work_run() into do_freezer_trap()
    change Fixes tag

Pavel Begunkov (2):
  io_uring/io-wq: limit retrying worker initialisation
  kernel: rerun task_work while freezing in get_signal()

 io_uring/io-wq.c | 10 +++++++---
 kernel/signal.c  |  8 ++++++++
 2 files changed, 15 insertions(+), 3 deletions(-)

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2.44.0