drivers/s390/char/hmcdrv_cache.h

File Facts

System

Linux kernel

Corpus path

drivers/s390/char/hmcdrv_cache.h

Extension

.h

Size

655 bytes

Lines

26

Domain

Driver Families

Bucket

drivers/s390

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/mmzone.h
• hmcdrv_ftp.h

Detected Declarations

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

Annotated Snippet

#ifndef __HMCDRV_CACHE_H__
#define __HMCDRV_CACHE_H__

#include <linux/mmzone.h>
#include "hmcdrv_ftp.h"

#define HMCDRV_CACHE_SIZE_DFLT	(MAX_ORDER_NR_PAGES * PAGE_SIZE / 2UL)

typedef ssize_t (*hmcdrv_cache_ftpfunc)(const struct hmcdrv_ftp_cmdspec *ftp,
					size_t *fsize);

ssize_t hmcdrv_cache_cmd(const struct hmcdrv_ftp_cmdspec *ftp,
			 hmcdrv_cache_ftpfunc func);
int hmcdrv_cache_startup(size_t cachesize);
void hmcdrv_cache_shutdown(void);

#endif	 /* __HMCDRV_CACHE_H__ */

Annotation

• Immediate include surface: `linux/mmzone.h`, `hmcdrv_ftp.h`.
• Atlas domain: Driver Families / drivers/s390.
• 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.