For a memoryless node, the output of get_pfn_range_for_nid are all zero.
It will display mem from 0 to -1.
Signed-off-by: NZhen Lei <thunder.leizhen@huawei.com>
Acked-by: NDavid Rientjes <rientjes@google.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>