drivers/dax/hmem/hmem.c

File Facts

System

Linux kernel

Corpus path

drivers/dax/hmem/hmem.c

Extension

.c

Size

6317 bytes

Lines

258

Domain

Driver Families

Bucket

drivers/dax

Inferred role

Driver Families: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/platform_device.h
• linux/memregion.h
• linux/module.h
• linux/dax.h
• ../../cxl/cxl.h
• ../bus.h

Detected Declarations

• function dax_hmem_probe
• function release_memregion
• function release_hmem
• function dax_hmem_flush_work
• function __hmem_register_device
• function hmem_register_cxl_device
• function process_defer_work
• function hmem_register_device
• function dax_hmem_platform_probe
• function dax_hmem_init
• function dax_hmem_exit
• module init dax_hmem_init

Annotated Snippet

module_init(dax_hmem_init);
module_exit(dax_hmem_exit);

MODULE_ALIAS("platform:hmem*");
MODULE_ALIAS("platform:hmem_platform*");
MODULE_DESCRIPTION("HMEM DAX: direct access to 'specific purpose' memory");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Intel Corporation");

Annotation

• Immediate include surface: `linux/platform_device.h`, `linux/memregion.h`, `linux/module.h`, `linux/dax.h`, `../../cxl/cxl.h`, `../bus.h`.
• Detected declarations: `function dax_hmem_probe`, `function release_memregion`, `function release_hmem`, `function dax_hmem_flush_work`, `function __hmem_register_device`, `function hmem_register_cxl_device`, `function process_defer_work`, `function hmem_register_device`, `function dax_hmem_platform_probe`, `function dax_hmem_init`.
• Atlas domain: Driver Families / drivers/dax.
• Implementation status: integration implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.