arch/um/include/shared/timetravel.h

File Facts

System

Linux kernel

Corpus path

arch/um/include/shared/timetravel.h

Extension

.h

Size

702 bytes

Lines

31

Domain

Architecture Layer

Bucket

arch/um

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

• No C-style include directives detected by the generator.

Detected Declarations

• enum time_travel_mode
• function time_travel_print_bc_msg

Annotated Snippet

#ifndef _UM_TIME_TRAVEL_H_
#define _UM_TIME_TRAVEL_H_

enum time_travel_mode {
	TT_MODE_OFF,
	TT_MODE_BASIC,
	TT_MODE_INFCPU,
	TT_MODE_EXTERNAL,
};

#if IS_ENABLED(CONFIG_UML_TIME_TRAVEL_SUPPORT)
extern enum time_travel_mode time_travel_mode;
extern int time_travel_should_print_bc_msg;
#else
#define time_travel_mode TT_MODE_OFF
#define time_travel_should_print_bc_msg 0
#endif /* CONFIG_UML_TIME_TRAVEL_SUPPORT */

void _time_travel_print_bc_msg(void);
static inline void time_travel_print_bc_msg(void)
{
	if (time_travel_should_print_bc_msg)
		_time_travel_print_bc_msg();
}

#endif /* _UM_TIME_TRAVEL_H_ */

Annotation

• Detected declarations: `enum time_travel_mode`, `function time_travel_print_bc_msg`.
• Atlas domain: Architecture Layer / arch/um.
• 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.