arch/arm/include/asm/kfence.h

File Facts

System

Linux kernel

Corpus path

arch/arm/include/asm/kfence.h

Extension

.h

Size

1058 bytes

Lines

54

Domain

Architecture Layer

Bucket

arch/arm

Inferred role

Architecture Layer: implementation source

Status

source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

• linux/kfence.h
• asm/pgalloc.h
• asm/set_memory.h

Detected Declarations

• function split_pmd_page
• function arch_kfence_init_pool
• function kfence_protect_page

Annotated Snippet

if (pmd_leaf(*pmd)) {
			if (split_pmd_page(pmd, addr & PMD_MASK))
				return false;
		}
	}

	return true;
}

static inline bool kfence_protect_page(unsigned long addr, bool protect)
{
	set_memory_valid(addr, 1, !protect);

	return true;
}

#endif /* __ASM_ARM_KFENCE_H */

Annotation

• Immediate include surface: `linux/kfence.h`, `asm/pgalloc.h`, `asm/set_memory.h`.
• Detected declarations: `function split_pmd_page`, `function arch_kfence_init_pool`, `function kfence_protect_page`.
• Atlas domain: Architecture Layer / arch/arm.
• 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.