powerpc/64s/radix: add warning and comments in mm_cpumask trim

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Add a comment explaining part of the logic for mm_cpumask trimming, and
add a (hopefully graceful) check and warning in case something gets it
wrong.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201217134731.488135-2-npiggin@gmail.com

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Nicholas Piggin 2020-12-17 23:47:25 +10:00 • committed by Michael Ellerman

parent e79b76e03b

commit a2496049f1

1 changed files with 21 additions and 6 deletions

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arch/powerpc/mm/book3s64/radix_tlb.c

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