[PATCH] maple_tree: shrink struct maple_tree from 24 to 16 bytes on LP64

[Matthew Wilcox]

On Tue, Aug 22, 2023 at 12:51:45AM +0200, Mateusz Guzik wrote:
> by plugging a padding hole.
> 
> [sounds like an obvious thing to do, am I missing something?]

That was how I originally had it.  Not sure when/why it got messed up.