drivers/leds/trigger/ledtrig-activity.c
Source file repositories/reference/linux-study-clean/drivers/leds/trigger/ledtrig-activity.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/leds/trigger/ledtrig-activity.c- Extension
.c- Size
- 7831 bytes
- Lines
- 271
- Domain
- Driver Families
- Bucket
- drivers/leds
- 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.
- Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
- Allocates kernel memory; connect allocation flags and lifetime to context constraints.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/init.hlinux/kernel.hlinux/kernel_stat.hlinux/leds.hlinux/module.hlinux/panic_notifier.hlinux/reboot.hlinux/sched.hlinux/slab.hlinux/timer.h../leds.h
Detected Declarations
struct activity_datafunction led_activity_functionfunction for_each_possible_cpufunction led_invert_showfunction led_invert_storefunction activity_activatefunction activity_deactivatefunction activity_reboot_notifierfunction activity_panic_notifierfunction activity_initfunction activity_exitmodule init activity_init
Annotated Snippet
module_init(activity_init);
module_exit(activity_exit);
MODULE_AUTHOR("Willy Tarreau <w@1wt.eu>");
MODULE_DESCRIPTION("Activity LED trigger");
MODULE_LICENSE("GPL v2");Annotation
- Immediate include surface: `linux/init.h`, `linux/kernel.h`, `linux/kernel_stat.h`, `linux/leds.h`, `linux/module.h`, `linux/panic_notifier.h`, `linux/reboot.h`, `linux/sched.h`.
- Detected declarations: `struct activity_data`, `function led_activity_function`, `function for_each_possible_cpu`, `function led_invert_show`, `function led_invert_store`, `function activity_activate`, `function activity_deactivate`, `function activity_reboot_notifier`, `function activity_panic_notifier`, `function activity_init`.
- Atlas domain: Driver Families / drivers/leds.
- Implementation status: integration implementation candidate.
- Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
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.