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Add a helper to display a panic banner soon to also be used for kCFI
failures, to ensure that we remain consistent.
Signed-off-by: Pierre-Clément Tosi <ptosi@google.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20240610063244.2828978-8-ptosi@google.com

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>