drivers/base/cacheinfo.c

File Facts

System

Linux kernel

Corpus path

drivers/base/cacheinfo.c

Extension

.c

Size

27456 bytes

Lines

1072

Domain

Driver Families

Bucket

drivers/base

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/acpi.h
• linux/bitfield.h
• linux/bitops.h
• linux/cacheinfo.h
• linux/compiler.h
• linux/cpu.h
• linux/device.h
• linux/init.h
• linux/of.h
• linux/sched.h
• linux/sched/topology.h
• linux/slab.h
• linux/smp.h
• linux/sysfs.h

Detected Declarations

• struct cache_type_info
• function cache_leaves_are_shared
• function last_level_cache_is_valid
• function update_per_cpu_data_slice_size_cpu
• function last_level_cache_is_shared
• function get_cacheinfo_idx
• function cache_size
• function cache_get_line_size
• function cache_nr_sets
• function cache_associativity
• function cache_node_is_unified
• function match_cache_node
• function cache_of_set_id
• function for_each_of_cpu_node
• function cache_of_set_props
• function cache_setup_of_node
• function of_check_cache_nodes
• function of_count_cache_leaves
• function init_of_cache_level
• function cache_setup_of_node
• function init_of_cache_level
• function cache_setup_acpi
• function cache_setup_properties
• function cache_shared_cpu_map_setup
• function for_each_online_cpu
• function cache_shared_cpu_map_remove
• function for_each_cpu
• function free_cache_attributes
• function early_cache_level
• function init_cache_level
• function populate_cache_leaves
• function allocate_cache_info
• function fetch_cache_info
• function init_level_allocate_ci
• function detect_cache_attributes
• function size_show
• function shared_cpu_map_show
• function shared_cpu_list_show
• function type_show
• function allocation_policy_show
• function write_policy_show
• function cache_default_attrs_is_visible
• function cache_get_priv_group
• function cache_get_attribute_groups
• function cpu_cache_sysfs_exit
• function cpu_cache_sysfs_init
• function cache_add_dev
• function cpu_map_shared_cache

Annotated Snippet

device_initcall(cacheinfo_sysfs_init);

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/bitfield.h`, `linux/bitops.h`, `linux/cacheinfo.h`, `linux/compiler.h`, `linux/cpu.h`, `linux/device.h`, `linux/init.h`.
• Detected declarations: `struct cache_type_info`, `function cache_leaves_are_shared`, `function last_level_cache_is_valid`, `function update_per_cpu_data_slice_size_cpu`, `function last_level_cache_is_shared`, `function get_cacheinfo_idx`, `function cache_size`, `function cache_get_line_size`, `function cache_nr_sets`, `function cache_associativity`.
• Atlas domain: Driver Families / drivers/base.
• 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.