drivers/acpi/acpi_pad.c

File Facts

System

Linux kernel

Corpus path

drivers/acpi/acpi_pad.c

Extension

.c

Size

11451 bytes

Lines

479

Domain

Driver Families

Bucket

drivers/acpi

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/kernel.h
• linux/cpumask.h
• linux/module.h
• linux/init.h
• linux/types.h
• linux/kthread.h
• uapi/linux/sched/types.h
• linux/freezer.h
• linux/cpu.h
• linux/tick.h
• linux/slab.h
• linux/acpi.h
• linux/perf_event.h
• linux/platform_device.h
• asm/cpuid/api.h
• asm/mwait.h
• xen/xen.h

Detected Declarations

• function power_saving_mwait_init
• function round_robin_cpu
• function exit_round_robin
• function power_saving_thread
• function create_power_saving_task
• function destroy_power_saving_task
• function set_power_saving_task_num
• function acpi_pad_idle_cpus
• function acpi_pad_idle_cpus_num
• function rrtime_store
• function rrtime_show
• function idlepct_store
• function idlepct_show
• function idlecpus_store
• function idlecpus_show
• function acpi_pad_pur
• function acpi_pad_handle_notify
• function acpi_pad_notify
• function acpi_pad_probe
• function acpi_pad_remove
• function acpi_pad_init
• function acpi_pad_exit
• module init acpi_pad_init

Annotated Snippet

module_init(acpi_pad_init);
module_exit(acpi_pad_exit);
MODULE_AUTHOR("Shaohua Li<shaohua.li@intel.com>");
MODULE_DESCRIPTION("ACPI Processor Aggregator Driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/cpumask.h`, `linux/module.h`, `linux/init.h`, `linux/types.h`, `linux/kthread.h`, `uapi/linux/sched/types.h`, `linux/freezer.h`.
• Detected declarations: `function power_saving_mwait_init`, `function round_robin_cpu`, `function exit_round_robin`, `function power_saving_thread`, `function create_power_saving_task`, `function destroy_power_saving_task`, `function set_power_saving_task_num`, `function acpi_pad_idle_cpus`, `function acpi_pad_idle_cpus_num`, `function rrtime_store`.
• Atlas domain: Driver Families / drivers/acpi.
• 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.