arch/arm/include/asm/idmap.h

File Facts

System

Linux kernel

Corpus path

arch/arm/include/asm/idmap.h

Extension

.h

Size

359 bytes

Lines

16

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/compiler.h
• linux/pgtable.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef __ASM_IDMAP_H
#define __ASM_IDMAP_H

#include <linux/compiler.h>
#include <linux/pgtable.h>

/* Tag a function as requiring to be executed via an identity mapping. */
#define __idmap __section(".idmap.text") noinline notrace

extern pgd_t *idmap_pgd;

void setup_mm_for_reboot(void);

#endif	/* __ASM_IDMAP_H */

Annotation

• Immediate include surface: `linux/compiler.h`, `linux/pgtable.h`.
• 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.