drivers/watchdog/xen_wdt.c

Source file repositories/reference/linux-study-clean/drivers/watchdog/xen_wdt.c

File Facts

System: Linux kernel
Corpus path: drivers/watchdog/xen_wdt.c
Extension: .c
Size: 4559 bytes
Lines: 209
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/bug.h
linux/errno.h
linux/fs.h
linux/hrtimer.h
linux/kernel.h
linux/ktime.h
linux/init.h
linux/module.h
linux/moduleparam.h
linux/platform_device.h
linux/watchdog.h
xen/xen.h
asm/xen/hypercall.h
xen/interface/sched.h

Detected Declarations

function set_timeout
function xen_wdt_start
function xen_wdt_stop
function xen_wdt_kick
function xen_wdt_get_timeleft
function xen_wdt_probe
function xen_wdt_suspend
function xen_wdt_resume
function xen_wdt_init_module
function xen_wdt_cleanup_module
module init xen_wdt_init_module

Annotated Snippet

module_init(xen_wdt_init_module);
module_exit(xen_wdt_cleanup_module);

MODULE_AUTHOR("Jan Beulich <jbeulich@novell.com>");
MODULE_DESCRIPTION("Xen WatchDog Timer Driver");
MODULE_LICENSE("GPL");

Annotation

Immediate include surface: `linux/bug.h`, `linux/errno.h`, `linux/fs.h`, `linux/hrtimer.h`, `linux/kernel.h`, `linux/ktime.h`, `linux/init.h`, `linux/module.h`.
Detected declarations: `function set_timeout`, `function xen_wdt_start`, `function xen_wdt_stop`, `function xen_wdt_kick`, `function xen_wdt_get_timeleft`, `function xen_wdt_probe`, `function xen_wdt_suspend`, `function xen_wdt_resume`, `function xen_wdt_init_module`, `function xen_wdt_cleanup_module`.
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.