release_mem_region_adjustable
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## Name

release_mem_region_adjustable — release a previously reserved memory region

## Synopsis

`int release_mem_region_adjustable (` | struct resource * parent,
| resource_size_t start,
| resource_size_t size`)`;

## Arguments

`parent`

  parent resource descriptor

`start`

  resource start address

`size`

  resource region size

## Description

This interface is intended for memory hot-delete. The requested region is released from a currently busy memory resource. The requested region must either match exactly or fit into a single busy resource entry. In the latter case, the remaining resource is adjusted accordingly. Existing children of the busy memory resource must be immutable in the request.

## Note

- Additional release conditions, such as overlapping region, can be supported after they are confirmed as valid cases. - When a busy memory resource gets split into two entries, the code assumes that all children remain in the lower address entry for simplicity. Enhance this logic when necessary.

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