arch/x86/include/asm/vgtod.h

File Facts

System

Linux kernel

Corpus path

arch/x86/include/asm/vgtod.h

Extension

.h

Size

422 bytes

Lines

20

Domain

Architecture Layer

Bucket

arch/x86

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
• asm/clocksource.h
• vdso/datapage.h
• vdso/helpers.h
• uapi/linux/time.h

Detected Declarations

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

Annotated Snippet

#ifndef _ASM_X86_VGTOD_H
#define _ASM_X86_VGTOD_H

/*
 * This check is required to prevent ARCH=um to include
 * unwanted headers.
 */
#ifdef CONFIG_GENERIC_GETTIMEOFDAY
#include <linux/compiler.h>
#include <asm/clocksource.h>
#include <vdso/datapage.h>
#include <vdso/helpers.h>

#include <uapi/linux/time.h>

#endif /* CONFIG_GENERIC_GETTIMEOFDAY */

#endif /* _ASM_X86_VGTOD_H */

Annotation

• Immediate include surface: `linux/compiler.h`, `asm/clocksource.h`, `vdso/datapage.h`, `vdso/helpers.h`, `uapi/linux/time.h`.
• Atlas domain: Architecture Layer / arch/x86.
• 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.