drivers/thermal/testing/command.c

File Facts

System

Linux kernel

Corpus path

drivers/thermal/testing/command.c

Extension

.c

Size

5634 bytes

Lines

224

Domain

Driver Families

Bucket

drivers/thermal

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern 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.
• 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/debugfs.h
• linux/module.h
• thermal_testing.h

Detected Declarations

• enum tt_commands
• function tt_command_exec
• function tt_command_process
• function tt_command_write
• function thermal_testing_init
• function thermal_testing_exit
• module init thermal_testing_init

Annotated Snippet

static const struct file_operations tt_command_fops = {
	.write = tt_command_write,
	.open =	 simple_open,
	.llseek = default_llseek,
};

static int __init thermal_testing_init(void)
{
	d_testing = debugfs_create_dir("thermal-testing", NULL);
	if (!IS_ERR(d_testing))
		debugfs_create_file("command", 0200, d_testing, NULL,
				    &tt_command_fops);

	return 0;
}
module_init(thermal_testing_init);

static void __exit thermal_testing_exit(void)
{
	debugfs_remove(d_testing);
	tt_zone_cleanup();
}
module_exit(thermal_testing_exit);

MODULE_DESCRIPTION("Thermal core testing facility");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/debugfs.h`, `linux/module.h`, `thermal_testing.h`.
• Detected declarations: `enum tt_commands`, `function tt_command_exec`, `function tt_command_process`, `function tt_command_write`, `function thermal_testing_init`, `function thermal_testing_exit`, `module init thermal_testing_init`.
• Atlas domain: Driver Families / drivers/thermal.
• 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.