lib/iommu-helper.c

File Facts

System

Linux kernel

Corpus path

lib/iommu-helper.c

Extension

.c

Size

755 bytes

Lines

30

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.

Dependency Surface

• linux/bitmap.h
• linux/iommu-helper.h

Detected Declarations

• function iommu_area_alloc

Annotated Snippet

if (iommu_is_span_boundary(index, nr, shift, boundary_size)) {
			start = ALIGN(shift + index, boundary_size) - shift;
			goto again;
		}
		bitmap_set(map, index, nr);
		return index;
	}
	return -1;
}

Annotation

• Immediate include surface: `linux/bitmap.h`, `linux/iommu-helper.h`.
• Detected declarations: `function iommu_area_alloc`.
• 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.