include/linux/irqnr.h

File Facts

System

Linux kernel

Corpus path

include/linux/irqnr.h

Extension

.h

Size

1538 bytes

Lines

41

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

Dependency Surface

• uapi/linux/irqnr.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef _LINUX_IRQNR_H
#define _LINUX_IRQNR_H

#include <uapi/linux/irqnr.h>


unsigned int irq_get_nr_irqs(void) __pure;
unsigned int irq_set_nr_irqs(unsigned int nr);
extern struct irq_desc *irq_to_desc(unsigned int irq);
unsigned int irq_get_next_irq(unsigned int offset);

#define for_each_irq_desc(irq, desc)                                      \
	for (unsigned int __nr_irqs__ = irq_get_nr_irqs(); __nr_irqs__;   \
	     __nr_irqs__ = 0)                                             \
		for (irq = 0, desc = irq_to_desc(irq); irq < __nr_irqs__; \
		     irq++, desc = irq_to_desc(irq))                      \
			if (!desc)                                        \
				;                                         \
			else

# define for_each_irq_desc_reverse(irq, desc)				\
	for (irq = irq_get_nr_irqs() - 1, desc = irq_to_desc(irq);	\
	     irq >= 0; irq--, desc = irq_to_desc(irq))			\
		if (!desc)						\
			;						\
		else

#define for_each_active_irq(irq)                                        \
	for (unsigned int __nr_irqs__ = irq_get_nr_irqs(); __nr_irqs__; \
	     __nr_irqs__ = 0)                                           \
		for (irq = irq_get_next_irq(0); irq < __nr_irqs__;      \
		     irq = irq_get_next_irq(irq + 1))

#define for_each_irq_nr(irq)                                            \
	for (unsigned int __nr_irqs__ = irq_get_nr_irqs(); __nr_irqs__; \
	     __nr_irqs__ = 0)                                           \
		for (irq = 0; irq < __nr_irqs__; irq++)

#endif

Annotation

• Immediate include surface: `uapi/linux/irqnr.h`.
• Atlas domain: Core OS / Core Kernel Interface.
• 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.