drivers/watchdog/softdog.c

File Facts

System

Linux kernel

Corpus path

drivers/watchdog/softdog.c

Extension

.c

Size

6324 bytes

Lines

223

Domain

Driver Families

Bucket

drivers/watchdog

Inferred role

Driver Families: exported/initcall integration point

Status

integration 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/hrtimer.h
• linux/init.h
• linux/kernel.h
• linux/kthread.h
• linux/module.h
• linux/moduleparam.h
• linux/reboot.h
• linux/types.h
• linux/watchdog.h
• linux/workqueue.h

Detected Declarations

• function reboot_kthread_fn
• function reboot_work_fn
• function softdog_fire
• function softdog_pretimeout
• function softdog_ping
• function softdog_stop
• function softdog_init
• function softdog_exit
• module init softdog_init

Annotated Snippet

module_init(softdog_init);

static void __exit softdog_exit(void)
{
	watchdog_unregister_device(&softdog_dev);
}
module_exit(softdog_exit);

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("Software Watchdog Device Driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/hrtimer.h`, `linux/init.h`, `linux/kernel.h`, `linux/kthread.h`, `linux/module.h`, `linux/moduleparam.h`, `linux/reboot.h`, `linux/types.h`.
• Detected declarations: `function reboot_kthread_fn`, `function reboot_work_fn`, `function softdog_fire`, `function softdog_pretimeout`, `function softdog_ping`, `function softdog_stop`, `function softdog_init`, `function softdog_exit`, `module init softdog_init`.
• Atlas domain: Driver Families / drivers/watchdog.
• Implementation status: integration 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.