arch/arm64/include/asm/irq.h

File Facts

System

Linux kernel

Corpus path

arch/arm64/include/asm/irq.h

Extension

.h

Size

571 bytes

Lines

27

Domain

Architecture Layer

Bucket

arch/arm64

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/cpumask.h
• asm-generic/irq.h

Detected Declarations

• struct pt_regs
• function nr_legacy_irqs

Annotated Snippet

#ifndef __ASM_IRQ_H
#define __ASM_IRQ_H

#ifndef __ASSEMBLER__

#include <linux/cpumask.h>

#include <asm-generic/irq.h>

void arch_trigger_cpumask_backtrace(const cpumask_t *mask, int exclude_cpu);
#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace

struct pt_regs;

int set_handle_irq(void (*handle_irq)(struct pt_regs *));
#define set_handle_irq	set_handle_irq
int set_handle_fiq(void (*handle_fiq)(struct pt_regs *));

static inline int nr_legacy_irqs(void)
{
	return 0;
}

#endif /* !__ASSEMBLER__ */
#endif

Annotation

• Immediate include surface: `linux/cpumask.h`, `asm-generic/irq.h`.
• Detected declarations: `struct pt_regs`, `function nr_legacy_irqs`.
• Atlas domain: Architecture Layer / arch/arm64.
• 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.