drivers/platform/x86/intel/uncore-frequency/uncore-frequency.c

File Facts

System

Linux kernel

Corpus path

drivers/platform/x86/intel/uncore-frequency/uncore-frequency.c

Extension

.c

Size

8383 bytes

Lines

331

Domain

Driver Families

Bucket

drivers/platform

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.
• 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/bitfield.h
• linux/cpu.h
• linux/module.h
• linux/slab.h
• linux/suspend.h
• asm/cpu_device_id.h
• asm/intel-family.h
• asm/msr.h
• uncore-frequency-common.h

Detected Declarations

• function uncore_read_control_freq
• function uncore_write_control_freq
• function uncore_read_freq
• function uncore_read
• function uncore_event_cpu_online
• function uncore_event_cpu_offline
• function uncore_pm_notify
• function intel_uncore_init
• function intel_uncore_exit
• module init intel_uncore_init

Annotated Snippet

module_init(intel_uncore_init)

static void __exit intel_uncore_exit(void)
{
	int i;

	unregister_pm_notifier(&uncore_pm_nb);
	cpuhp_remove_state(uncore_hp_state);
	for (i = 0; i < uncore_max_entries; ++i)
		uncore_freq_remove_die_entry(&uncore_instances[i]);
	uncore_freq_common_exit();
	kfree(uncore_instances);
}
module_exit(intel_uncore_exit)

MODULE_IMPORT_NS("INTEL_UNCORE_FREQUENCY");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Intel Uncore Frequency Limits Driver");

Annotation

• Immediate include surface: `linux/bitfield.h`, `linux/cpu.h`, `linux/module.h`, `linux/slab.h`, `linux/suspend.h`, `asm/cpu_device_id.h`, `asm/intel-family.h`, `asm/msr.h`.
• Detected declarations: `function uncore_read_control_freq`, `function uncore_write_control_freq`, `function uncore_read_freq`, `function uncore_read`, `function uncore_event_cpu_online`, `function uncore_event_cpu_offline`, `function uncore_pm_notify`, `function intel_uncore_init`, `function intel_uncore_exit`, `module init intel_uncore_init`.
• Atlas domain: Driver Families / drivers/platform.
• 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.