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Add helper function to get process device data structure from adev to update counters. Update vm faults, page_in, page_out counters will no be executed in parallel, use WRITE_ONCE to avoid any form of compiler optimizations. Signed-off-by: Philip Yang <Philip.Yang@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>