It constantly returns false since 2017. One assertion is added in 2019 but
it should never have triggered, IOW it means what is checked should be
asserted instead.
If it didn't exist for 7 years maybe it's good idea to remove it and only
add it when it comes.
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
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