arch/s390/include/asm/idle.h

File Facts

System

Linux kernel

Corpus path

arch/s390/include/asm/idle.h

Extension

.h

Size

560 bytes

Lines

28

Domain

Architecture Layer

Bucket

arch/s390

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/percpu-defs.h
• linux/types.h
• asm/tod_types.h

Detected Declarations

• struct s390_idle_data

Annotated Snippet

struct s390_idle_data {
#ifdef CONFIG_NO_HZ_COMMON
	bool	      in_idle;
#endif
	unsigned long timer_idle_enter;
	unsigned long mt_cycles_enter[8];
	union tod_clock clock_idle_enter;
	union tod_clock clock_idle_exit;
};

DECLARE_PER_CPU(struct s390_idle_data, s390_idle);

#endif /* _S390_IDLE_H */

Annotation

• Immediate include surface: `linux/percpu-defs.h`, `linux/types.h`, `asm/tod_types.h`.
• Detected declarations: `struct s390_idle_data`.
• Atlas domain: Architecture Layer / arch/s390.
• 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.