include/linux/platform_data/x86/p2sb.h

File Facts

System

Linux kernel

Corpus path

include/linux/platform_data/x86/p2sb.h

Extension

.h

Size

575 bytes

Lines

29

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

• linux/errno.h
• linux/kconfig.h

Detected Declarations

• struct pci_bus
• struct resource
• function p2sb_bar

Annotated Snippet

#ifndef _PLATFORM_DATA_X86_P2SB_H
#define _PLATFORM_DATA_X86_P2SB_H

#include <linux/errno.h>
#include <linux/kconfig.h>

struct pci_bus;
struct resource;

#if IS_BUILTIN(CONFIG_P2SB)

int p2sb_bar(struct pci_bus *bus, unsigned int devfn, struct resource *mem);

#else /* CONFIG_P2SB */

static inline int p2sb_bar(struct pci_bus *bus, unsigned int devfn, struct resource *mem)
{
	return -ENODEV;
}

#endif /* CONFIG_P2SB is not set */

#endif /* _PLATFORM_DATA_X86_P2SB_H */

Annotation

• Immediate include surface: `linux/errno.h`, `linux/kconfig.h`.
• Detected declarations: `struct pci_bus`, `struct resource`, `function p2sb_bar`.
• 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.