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 xWNWTlKu 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Howlett wrote: > > Since MAS_NONE is used for handling of the maple tree when it's a single > > entry at 0 (just a pointer), changing the handling of MAS_NONE in > > mas_find() would make the code more complicated and error prone. > > Single entry at index 0 is MAS_ROOT, not MAS_NONE. Ah, sorry. I didn't explain this well. We end up in MAS_NONE when we search from MAS_ROOT upwards.. that is, there's a value only at 0 and we request 1 - ULONG_MAX, or we've called mas_find() with an index > 0. So there is no node in the tree for this entry. The complication arises when mas_prev(), mas_next() or mas_walk()/mas_find() has already set MAS_NONE, then we can't tell the difference and so we don't really know what the Right Thing to do would be.