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Memory re-registration is a feature that enables changing the attributes of a memory region registered by user-space, including PD, translation (address and length) and access flags. Add the required support in uverbs and the kernel verbs API. Signed-off-by: Matan Barak <matanb@mellanox.com> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>