drivers/cpuidle/cpuidle-haltpoll.c

File Facts

System

Linux kernel

Corpus path

drivers/cpuidle/cpuidle-haltpoll.c

Extension

.c

Size

3251 bytes

Lines

147

Domain

Driver Families

Bucket

drivers/cpuidle

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/init.h
• linux/cpu.h
• linux/cpuidle.h
• linux/module.h
• linux/sched/idle.h
• linux/kvm_para.h
• linux/cpuidle_haltpoll.h

Detected Declarations

• function default_enter_idle
• function haltpoll_cpu_online
• function haltpoll_cpu_offline
• function haltpoll_uninit
• function haltpoll_want
• function haltpoll_init
• function haltpoll_exit
• module init haltpoll_init

Annotated Snippet

module_init(haltpoll_init);
module_exit(haltpoll_exit);
MODULE_DESCRIPTION("cpuidle driver for haltpoll governor");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Marcelo Tosatti <mtosatti@redhat.com>");

Annotation

• Immediate include surface: `linux/init.h`, `linux/cpu.h`, `linux/cpuidle.h`, `linux/module.h`, `linux/sched/idle.h`, `linux/kvm_para.h`, `linux/cpuidle_haltpoll.h`.
• Detected declarations: `function default_enter_idle`, `function haltpoll_cpu_online`, `function haltpoll_cpu_offline`, `function haltpoll_uninit`, `function haltpoll_want`, `function haltpoll_init`, `function haltpoll_exit`, `module init haltpoll_init`.
• Atlas domain: Driver Families / drivers/cpuidle.
• 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.