Matthew Wilcox (Oracle) 3012110d71 XArray: Fix splitting to non-zero orders ...

Splitting an order-4 entry into order-2 entries would leave the array
containing pointers to 000040008000c000 instead of 000044448888cccc.
This is a one-character fix, but enhance the test suite to check this
case.

Reported-by: Zi Yan <ziy@nvidia.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

2021-03-30 13:42:33 -04:00

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