include/linux/devfreq-governor.h

File Facts

System

Linux kernel

Corpus path

include/linux/devfreq-governor.h

Extension

.h

Size

3470 bytes

Lines

103

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/devfreq.h

Detected Declarations

• struct devfreq_governor
• function devfreq_update_stats

Annotated Snippet

struct devfreq_governor {
	struct list_head node;

	const char name[DEVFREQ_NAME_LEN];
	const u64 attrs;
	const u64 flags;
	int (*get_target_freq)(struct devfreq *this, unsigned long *freq);
	int (*event_handler)(struct devfreq *devfreq,
				unsigned int event, void *data);
};

void devfreq_monitor_start(struct devfreq *devfreq);
void devfreq_monitor_stop(struct devfreq *devfreq);
void devfreq_monitor_suspend(struct devfreq *devfreq);
void devfreq_monitor_resume(struct devfreq *devfreq);
void devfreq_update_interval(struct devfreq *devfreq, unsigned int *delay);

int devfreq_add_governor(struct devfreq_governor *governor);
int devfreq_remove_governor(struct devfreq_governor *governor);

int devm_devfreq_add_governor(struct device *dev,
			      struct devfreq_governor *governor);

int devfreq_update_status(struct devfreq *devfreq, unsigned long freq);
int devfreq_update_target(struct devfreq *devfreq, unsigned long freq);
void devfreq_get_freq_range(struct devfreq *devfreq, unsigned long *min_freq,
			    unsigned long *max_freq);

static inline int devfreq_update_stats(struct devfreq *df)
{
	if (!df->profile->get_dev_status)
		return -EINVAL;

	return df->profile->get_dev_status(df->dev.parent, &df->last_status);
}
#endif /* __LINUX_DEVFREQ_DEVFREQ_H__ */

Annotation

• Immediate include surface: `linux/devfreq.h`.
• Detected declarations: `struct devfreq_governor`, `function devfreq_update_stats`.
• 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.