drivers/watchdog/watchdog_pretimeout.h

File Facts

System

Linux kernel

Corpus path

drivers/watchdog/watchdog_pretimeout.h

Extension

.h

Size

1684 bytes

Lines

62

Domain

Driver Families

Bucket

drivers/watchdog

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

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

Detected Declarations

• struct watchdog_device
• struct watchdog_governor
• function watchdog_register_pretimeout
• function watchdog_unregister_pretimeout
• function watchdog_pretimeout_governor_get
• function watchdog_pretimeout_governor_set

Annotated Snippet

struct watchdog_governor {
	const char	name[WATCHDOG_GOV_NAME_MAXLEN];
	void		(*pretimeout)(struct watchdog_device *wdd);
};

#if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_GOV)
/* Interfaces to watchdog pretimeout governors */
int watchdog_register_governor(struct watchdog_governor *gov);
void watchdog_unregister_governor(struct watchdog_governor *gov);

/* Interfaces to watchdog_dev.c */
int watchdog_register_pretimeout(struct watchdog_device *wdd);
void watchdog_unregister_pretimeout(struct watchdog_device *wdd);
int watchdog_pretimeout_available_governors_get(char *buf);
int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, char *buf);
int watchdog_pretimeout_governor_set(struct watchdog_device *wdd,
				     const char *buf);

#if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP)
#define WATCHDOG_PRETIMEOUT_DEFAULT_GOV		"noop"
#elif IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC)
#define WATCHDOG_PRETIMEOUT_DEFAULT_GOV		"panic"
#endif

#else
static inline int watchdog_register_pretimeout(struct watchdog_device *wdd)
{
	return 0;
}

static inline void watchdog_unregister_pretimeout(struct watchdog_device *wdd)
{
}

static inline int watchdog_pretimeout_available_governors_get(char *buf)
{
	return -EINVAL;
}

static inline int watchdog_pretimeout_governor_get(struct watchdog_device *wdd,
						   char *buf)
{
	return -EINVAL;
}

static inline int watchdog_pretimeout_governor_set(struct watchdog_device *wdd,
						   const char *buf)
{
	return -EINVAL;
}
#endif

#endif

Annotation

• Detected declarations: `struct watchdog_device`, `struct watchdog_governor`, `function watchdog_register_pretimeout`, `function watchdog_unregister_pretimeout`, `function watchdog_pretimeout_governor_get`, `function watchdog_pretimeout_governor_set`.
• Atlas domain: Driver Families / drivers/watchdog.
• 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.