arch/um/drivers/rtc_kern.c
Source file repositories/reference/linux-study-clean/arch/um/drivers/rtc_kern.c
File Facts
- System
- Linux kernel
- Corpus path
arch/um/drivers/rtc_kern.c- Extension
.c- Size
- 4285 bytes
- Lines
- 214
- Domain
- Architecture Layer
- Bucket
- arch/um
- Inferred role
- Architecture Layer: exported/initcall integration point
- Status
- integration implementation candidate
Why This File Exists
CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
- Touches IRQ or DMA behavior; this matters for the representative real-device path.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/platform_device.hlinux/time-internal.hlinux/suspend.hlinux/err.hlinux/rtc.hkern_util.hirq_kern.hos.hrtc.h
Detected Declarations
function uml_rtc_time_travel_alarmfunction uml_rtc_read_timefunction uml_rtc_read_alarmfunction uml_rtc_alarm_irq_enablefunction uml_rtc_set_alarmfunction uml_rtc_interruptfunction uml_rtc_setupfunction uml_rtc_cleanupfunction uml_rtc_probefunction uml_rtc_removefunction uml_rtc_initmodule init uml_rtc_init
Annotated Snippet
device_initcall(uml_rtc_init);Annotation
- Immediate include surface: `linux/platform_device.h`, `linux/time-internal.h`, `linux/suspend.h`, `linux/err.h`, `linux/rtc.h`, `kern_util.h`, `irq_kern.h`, `os.h`.
- Detected declarations: `function uml_rtc_time_travel_alarm`, `function uml_rtc_read_time`, `function uml_rtc_read_alarm`, `function uml_rtc_alarm_irq_enable`, `function uml_rtc_set_alarm`, `function uml_rtc_interrupt`, `function uml_rtc_setup`, `function uml_rtc_cleanup`, `function uml_rtc_probe`, `function uml_rtc_remove`.
- Atlas domain: Architecture Layer / arch/um.
- Implementation status: integration implementation candidate.
- IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.
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.