drivers/cpuidle/cpuidle-pseries.c

File Facts

System

Linux kernel

Corpus path

drivers/cpuidle/cpuidle-pseries.c

Extension

.c

Size

12651 bytes

Lines

482

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/kernel.h
• linux/module.h
• linux/init.h
• linux/moduleparam.h
• linux/cpuidle.h
• linux/cpu.h
• linux/notifier.h
• asm/paca.h
• asm/reg.h
• asm/machdep.h
• asm/firmware.h
• asm/runlatch.h
• asm/idle.h
• asm/plpar_wrappers.h
• asm/rtas.h
• asm/time.h

Detected Declarations

• struct xcede_latency_record
• struct xcede_latency_payload
• struct xcede_latency_parameter
• function snooze_loop
• function check_and_cede_processor
• function parse_cede_parameters
• function dedicated_cede_loop
• function shared_cede_loop
• function pseries_cpuidle_cpu_online
• function pseries_cpuidle_cpu_dead
• function pseries_cpuidle_driver_init
• function fixup_cede0_latency
• function CEDE
• function pseries_idle_probe
• function pseries_processor_idle_init
• module init pseries_processor_idle_init

Annotated Snippet

device_initcall(pseries_processor_idle_init);

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/init.h`, `linux/moduleparam.h`, `linux/cpuidle.h`, `linux/cpu.h`, `linux/notifier.h`, `asm/paca.h`.
• Detected declarations: `struct xcede_latency_record`, `struct xcede_latency_payload`, `struct xcede_latency_parameter`, `function snooze_loop`, `function check_and_cede_processor`, `function parse_cede_parameters`, `function dedicated_cede_loop`, `function shared_cede_loop`, `function pseries_cpuidle_cpu_online`, `function pseries_cpuidle_cpu_dead`.
• 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.