arch/arm/common/bL_switcher_dummy_if.c

File Facts

System

Linux kernel

Corpus path

arch/arm/common/bL_switcher_dummy_if.c

Extension

.c

Size

1381 bytes

Lines

61

Domain

Architecture Layer

Bucket

arch/arm

Inferred role

Architecture Layer: operation-table or driver-model contract

Status

pattern 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.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/init.h
• linux/module.h
• linux/fs.h
• linux/miscdevice.h
• linux/uaccess.h
• asm/bL_switcher.h

Detected Declarations

• function bL_switcher_write

Annotated Snippet

static const struct file_operations bL_switcher_fops = {
	.write		= bL_switcher_write,
	.owner	= THIS_MODULE,
};

static struct miscdevice bL_switcher_device = {
	MISC_DYNAMIC_MINOR,
	"b.L_switcher",
	&bL_switcher_fops
};
module_misc_device(bL_switcher_device);

MODULE_AUTHOR("Nicolas Pitre <nico@linaro.org>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("big.LITTLE switcher dummy user interface");

Annotation

• Immediate include surface: `linux/init.h`, `linux/module.h`, `linux/fs.h`, `linux/miscdevice.h`, `linux/uaccess.h`, `asm/bL_switcher.h`.
• Detected declarations: `function bL_switcher_write`.
• Atlas domain: Architecture Layer / arch/arm.
• Implementation status: pattern implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.

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.