This series combines the two uses thus far identified for cpuhp in
random.c. v3 uses prepare instead of teardown. v4 guards the added
function with CONFIG_SMP, since it's not used on !CONFIG_SMP.

Jason A. Donenfeld (2):
  random: set fast pool count to zero in cpuhp prepare
  random: invalidate crngs and batches in cpuhp prepare

 drivers/char/random.c      | 47 ++++++++++++++++++++++++++------------
 include/linux/cpuhotplug.h |  1 +
 include/linux/random.h     |  4 ++++
 kernel/cpu.c               |  6 +++++
 4 files changed, 43 insertions(+), 15 deletions(-)

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2.35.0