drivers/firmware/sysfb.c
Source file repositories/reference/linux-study-clean/drivers/firmware/sysfb.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/firmware/sysfb.c- Extension
.c- Size
- 5703 bytes
- Lines
- 226
- Domain
- Driver Families
- Bucket
- drivers/firmware
- 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/err.hlinux/init.hlinux/kernel.hlinux/mm.hlinux/pci.hlinux/platform_data/simplefb.hlinux/platform_device.hlinux/screen_info.hlinux/sysfb.h
Detected Declarations
function sysfb_unregisterfunction sysfb_disablefunction sysfb_handles_screen_infofunction sysfb_pci_dev_is_enabledfunction sysfb_pci_dev_is_enabledfunction sysfb_initmodule init sysfb_initexport sysfb_disableexport sysfb_handles_screen_info
Annotated Snippet
device_initcall(sysfb_init);Annotation
- Immediate include surface: `linux/err.h`, `linux/init.h`, `linux/kernel.h`, `linux/mm.h`, `linux/pci.h`, `linux/platform_data/simplefb.h`, `linux/platform_device.h`, `linux/screen_info.h`.
- Detected declarations: `function sysfb_unregister`, `function sysfb_disable`, `function sysfb_handles_screen_info`, `function sysfb_pci_dev_is_enabled`, `function sysfb_pci_dev_is_enabled`, `function sysfb_init`, `module init sysfb_init`, `export sysfb_disable`, `export sysfb_handles_screen_info`.
- Atlas domain: Driver Families / drivers/firmware.
- 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.