crypto/zstd.c
Source file repositories/reference/linux-study-clean/crypto/zstd.c
File Facts
- System
- Linux kernel
- Corpus path
crypto/zstd.c- Extension
.c- Size
- 6465 bytes
- Lines
- 316
- Domain
- Kernel Services
- Bucket
- crypto
- 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.
- 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/crypto.hlinux/init.hlinux/interrupt.hlinux/mm.hlinux/module.hlinux/net.hlinux/overflow.hlinux/vmalloc.hlinux/zstd.hcrypto/internal/acompress.hcrypto/scatterwalk.h
Detected Declarations
struct zstd_ctxfunction zstd_free_streamfunction zstd_initfunction zstd_compress_onefunction zstd_compressfunction zstd_decompress_onefunction zstd_decompressfunction zstd_mod_initfunction zstd_mod_finimodule init zstd_mod_init
Annotated Snippet
module_init(zstd_mod_init);
module_exit(zstd_mod_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Zstd Compression Algorithm");
MODULE_ALIAS_CRYPTO("zstd");Annotation
- Immediate include surface: `linux/crypto.h`, `linux/init.h`, `linux/interrupt.h`, `linux/mm.h`, `linux/module.h`, `linux/net.h`, `linux/overflow.h`, `linux/vmalloc.h`.
- Detected declarations: `struct zstd_ctx`, `function zstd_free_stream`, `function zstd_init`, `function zstd_compress_one`, `function zstd_compress`, `function zstd_decompress_one`, `function zstd_decompress`, `function zstd_mod_init`, `function zstd_mod_fini`, `module init zstd_mod_init`.
- Atlas domain: Kernel Services / crypto.
- 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.