tools/perf/trace/beauty/include/uapi/linux/fadvise.h

File Facts

System

Linux kernel

Corpus path

tools/perf/trace/beauty/include/uapi/linux/fadvise.h

Extension

.h

Size

842 bytes

Lines

23

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.

Dependency Surface

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

Detected Declarations

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

Annotated Snippet

#ifndef FADVISE_H_INCLUDED
#define FADVISE_H_INCLUDED

#define POSIX_FADV_NORMAL	0 /* No further special treatment.  */
#define POSIX_FADV_RANDOM	1 /* Expect random page references.  */
#define POSIX_FADV_SEQUENTIAL	2 /* Expect sequential page references.  */
#define POSIX_FADV_WILLNEED	3 /* Will need these pages.  */

/*
 * The advise values for POSIX_FADV_DONTNEED and POSIX_ADV_NOREUSE
 * for s390-64 differ from the values for the rest of the world.
 */
#if defined(__s390x__)
#define POSIX_FADV_DONTNEED	6 /* Don't need these pages.  */
#define POSIX_FADV_NOREUSE	7 /* Data will be accessed once.  */
#else
#define POSIX_FADV_DONTNEED	4 /* Don't need these pages.  */
#define POSIX_FADV_NOREUSE	5 /* Data will be accessed once.  */
#endif

#endif	/* FADVISE_H_INCLUDED */

Annotation

• Atlas domain: Support Tooling And Documentation / tools.
• 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.