lib/raid/raid6/x86/pq_arch.h

File Facts

System

Linux kernel

Corpus path

lib/raid/raid6/x86/pq_arch.h

Extension

.h

Size

2889 bytes

Lines

97

Domain

Kernel Services

Bucket

lib

Inferred role

Kernel Services: implementation source

Status

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

Dependency Surface

• asm/cpufeature.h

Detected Declarations

• function raid6_has_avx512
• function raid6_has_avx2
• function raid6_has_ssse3
• function raid6_has_sse2
• function raid6_has_sse1_or_mmxext
• function arch_raid6_init

Annotated Snippet

if (raid6_has_avx512()) {
			raid6_algo_add(&raid6_avx512x1);
			raid6_algo_add(&raid6_avx512x2);
			if (IS_ENABLED(CONFIG_X86_64))
				raid6_algo_add(&raid6_avx512x4);
		}
	} else if (IS_ENABLED(CONFIG_X86_64) || raid6_has_sse2()) {
		/* x86_64 can assume SSE2 as baseline */
		raid6_algo_add(&raid6_sse2x1);
		raid6_algo_add(&raid6_sse2x2);
		if (IS_ENABLED(CONFIG_X86_64))
			raid6_algo_add(&raid6_sse2x4);
	} else {
		raid6_algo_add_default();
		if (raid6_has_sse1_or_mmxext()) {
			raid6_algo_add(&raid6_sse1x1);
			raid6_algo_add(&raid6_sse1x2);
		} else if (boot_cpu_has(X86_FEATURE_MMX)) {
			raid6_algo_add(&raid6_mmxx1);
			raid6_algo_add(&raid6_mmxx2);
		}
	}

	if (raid6_has_avx512())
		raid6_recov_algo_add(&raid6_recov_avx512);
	else if (raid6_has_avx2())
		raid6_recov_algo_add(&raid6_recov_avx2);
	else if (raid6_has_ssse3())
		raid6_recov_algo_add(&raid6_recov_ssse3);
}

Annotation

• Immediate include surface: `asm/cpufeature.h`.
• Detected declarations: `function raid6_has_avx512`, `function raid6_has_avx2`, `function raid6_has_ssse3`, `function raid6_has_sse2`, `function raid6_has_sse1_or_mmxext`, `function arch_raid6_init`.
• Atlas domain: Kernel Services / lib.
• Implementation status: source 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.