When doing ioctls, we have to map the user data using vmapbuf. Rather
than reaching inside the buf, create nvme_allocate_request_buf to use
memdesc_buf. This also understands unmapped I/O.
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Differential D52110
nvme: Add nvme_allocate_request_buf imp on Aug 22 2025, 1:15 AM. Authored by Tags None Referenced Files
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