arch/x86/include/asm/clocksource.h

File Facts

System

Linux kernel

Corpus path

arch/x86/include/asm/clocksource.h

Extension

.h

Size

480 bytes

Lines

22

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

• asm/vdso/clocksource.h

Detected Declarations

• function vclock_was_used
• function vclocks_set_used

Annotated Snippet

#ifndef _ASM_X86_CLOCKSOURCE_H
#define _ASM_X86_CLOCKSOURCE_H

#include <asm/vdso/clocksource.h>

extern unsigned int vclocks_used;

static inline bool vclock_was_used(int vclock)
{
	return READ_ONCE(vclocks_used) & (1U << vclock);
}

static inline void vclocks_set_used(unsigned int which)
{
	WRITE_ONCE(vclocks_used, READ_ONCE(vclocks_used) | (1 << which));
}

#endif /* _ASM_X86_CLOCKSOURCE_H */

Annotation

• Immediate include surface: `asm/vdso/clocksource.h`.
• Detected declarations: `function vclock_was_used`, `function vclocks_set_used`.
• 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.