tools/testing/shared/linux/preempt.h

File Facts

System

Linux kernel

Corpus path

tools/testing/shared/linux/preempt.h

Extension

.h

Size

311 bytes

Lines

16

Domain

Support Tooling And Documentation

Bucket

tools

Inferred role

Support Tooling And Documentation: implementation source

Status

source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.

Dependency Surface

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

Detected Declarations

• function in_interrupt

Annotated Snippet

#ifndef __LINUX_PREEMPT_H
#define __LINUX_PREEMPT_H

extern int preempt_count;

#define preempt_disable()	uatomic_inc(&preempt_count)
#define preempt_enable()	uatomic_dec(&preempt_count)

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

#endif /* __LINUX_PREEMPT_H */

Annotation

• Detected declarations: `function in_interrupt`.
• Atlas domain: Support Tooling And Documentation / tools.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.