include/uapi/linux/patchkey.h

File Facts

System

Linux kernel

Corpus path

include/uapi/linux/patchkey.h

Extension

.h

Size

965 bytes

Lines

39

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.

Dependency Surface

• endian.h

Detected Declarations

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

Annotated Snippet

#ifndef _LINUX_PATCHKEY_H_INDIRECT
#error "patchkey.h included directly"
#endif

#ifndef _UAPI_LINUX_PATCHKEY_H
#define _UAPI_LINUX_PATCHKEY_H

/* Endian macros. */
#ifndef __KERNEL__
#  include <endian.h>
#endif

#if !defined(__KERNEL__)
#if defined(__BYTE_ORDER)
#  if __BYTE_ORDER == __BIG_ENDIAN
#    define _PATCHKEY(id) (0xfd00|id)
#  elif __BYTE_ORDER == __LITTLE_ENDIAN
#    define _PATCHKEY(id) ((id<<8)|0x00fd)
#  else
#    error "could not determine byte order"
#  endif
#endif
#endif

#endif /* _UAPI_LINUX_PATCHKEY_H */

Annotation

• Immediate include surface: `endian.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.