| release_mem_region_adjustable(9) - phpMan
RELEASE_MEM_REGION_A(9) Hardware Interfaces RELEASE_MEM_REGION_A(9)
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.
COPYRIGHT
Kernel Hackers Manual 4.8. January 2017 RELEASE_MEM_REGION_A(9)
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