Use of devicetree overlay properties

Hello,

it seems that const pointers to devicetree property content are often
used throughout kernel code.

Saving pointers into static devicetree should be fine but saving
pointers into an overlay that can be destroyed is somewhat
problematic.

Typically the property would be used by a driver that would unbind
when the overlay is destroyed. Is this guaranteed in any way, though?

Thanks

Michal
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