drivers/pnp/core.c

File Facts

System

Linux kernel

Corpus path

drivers/pnp/core.c

Extension

.c

Size

4658 bytes

Lines

225

Domain

Driver Families

Bucket

drivers/pnp

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/pnp.h
• linux/types.h
• linux/list.h
• linux/device.h
• linux/module.h
• linux/mutex.h
• linux/init.h
• linux/string.h
• linux/slab.h
• linux/errno.h
• linux/dma-mapping.h
• base.h

Detected Declarations

• function pnp_remove_protocol
• function pnp_register_protocol
• function pnp_free_ids
• function pnp_free_resource
• function pnp_free_resources
• function list_for_each_entry_safe
• function pnp_release_device
• function pnp_delist_device
• function __pnp_add_device
• function pnp_add_device
• function pnp_init
• module init pnp_init
• export pnp_platform_devices

Annotated Snippet

subsys_initcall(pnp_init);

int pnp_debug;

#if defined(CONFIG_PNP_DEBUG_MESSAGES)
module_param_named(debug, pnp_debug, int, 0644);
#endif

Annotation

• Immediate include surface: `linux/pnp.h`, `linux/types.h`, `linux/list.h`, `linux/device.h`, `linux/module.h`, `linux/mutex.h`, `linux/init.h`, `linux/string.h`.
• Detected declarations: `function pnp_remove_protocol`, `function pnp_register_protocol`, `function pnp_free_ids`, `function pnp_free_resource`, `function pnp_free_resources`, `function list_for_each_entry_safe`, `function pnp_release_device`, `function pnp_delist_device`, `function __pnp_add_device`, `function pnp_add_device`.
• Atlas domain: Driver Families / drivers/pnp.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.