lib/842/842_compress.c

File Facts

System

Linux kernel

Corpus path

lib/842/842_compress.c

Extension

.c

Size

14780 bytes

Lines

633

Domain

Kernel Services

Bucket

lib

Inferred role

Kernel Services: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

• Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.
• 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/hashtable.h
• 842.h
• 842_debugfs.h

Detected Declarations

• struct sw842_hlist_node8
• struct sw842_hlist_node4
• struct sw842_hlist_node2
• struct sw842_param
• function __split_add_bits
• function add_bits
• function add_template
• function add_repeat_template
• function add_short_data_template
• function add_zeros_template
• function add_end_template
• function check_template
• function get_next_data
• function update_hashtables
• function process_next
• function sw842_compress
• function sw842_init
• function sw842_exit
• module init sw842_init
• export sw842_compress

Annotated Snippet

module_init(sw842_init);

static void __exit sw842_exit(void)
{
	if (sw842_template_counts)
		sw842_debugfs_remove();
}
module_exit(sw842_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Software 842 Compressor");
MODULE_AUTHOR("Dan Streetman <ddstreet@ieee.org>");

Annotation

• Immediate include surface: `linux/hashtable.h`, `842.h`, `842_debugfs.h`.
• Detected declarations: `struct sw842_hlist_node8`, `struct sw842_hlist_node4`, `struct sw842_hlist_node2`, `struct sw842_param`, `function __split_add_bits`, `function add_bits`, `function add_template`, `function add_repeat_template`, `function add_short_data_template`, `function add_zeros_template`.
• Atlas domain: Kernel Services / lib.
• 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.