include/linux/irqreturn.h

File Facts

System

Linux kernel

Corpus path

include/linux/irqreturn.h

Extension

.h

Size

529 bytes

Lines

21

Domain

Core OS

Bucket

Core Kernel Interface

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.

Dependency Surface

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

Detected Declarations

• enum irqreturn

Annotated Snippet

#ifndef _LINUX_IRQRETURN_H
#define _LINUX_IRQRETURN_H

/**
 * enum irqreturn - irqreturn type values
 * @IRQ_NONE:		interrupt was not from this device or was not handled
 * @IRQ_HANDLED:	interrupt was handled by this device
 * @IRQ_WAKE_THREAD:	handler requests to wake the handler thread
 */
enum irqreturn {
	IRQ_NONE		= (0 << 0),
	IRQ_HANDLED		= (1 << 0),
	IRQ_WAKE_THREAD		= (1 << 1),
};

typedef enum irqreturn irqreturn_t;
#define IRQ_RETVAL(x)	((x) ? IRQ_HANDLED : IRQ_NONE)

#endif

Annotation

• Detected declarations: `enum irqreturn`.
• Atlas domain: Core OS / Core Kernel Interface.
• Implementation status: source implementation candidate.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.