Matthew Wilcox a97e7904c0 mm: Convert workingset to XArray ...

We construct an XA_STATE and use it to delete the node with
xas_store() rather than adding a special function for this unique
use case.  Includes a test that simulates this usage for the
test suite.

Signed-off-by: Matthew Wilcox <willy@infradead.org>

2018-10-21 10:46:36 -04:00

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