drivers/s390/cio/cio_inject.c

File Facts

System

Linux kernel

Corpus path

drivers/s390/cio/cio_inject.c

Extension

.c

Size

3698 bytes

Lines

171

Domain

Driver Families

Bucket

drivers/s390

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.
• 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/slab.h
• linux/spinlock.h
• linux/mm.h
• linux/debugfs.h
• asm/chpid.h
• cio_inject.h
• cio_debug.h

Detected Declarations

• function crw_inject
• function stcrw_get_injected
• function crw_inject_write
• function enable_inject_write
• function cio_inject_init
• module init cio_inject_init

Annotated Snippet

static const struct file_operations crw_fops = {
	.owner = THIS_MODULE,
	.write = crw_inject_write,
};

static const struct file_operations cio_en_fops = {
	.owner = THIS_MODULE,
	.write = enable_inject_write,
};

static int __init cio_inject_init(void)
{
	/* enable_inject node enables the static branching */
	debugfs_create_file("enable_inject", 0200, cio_debugfs_dir,
			    NULL, &cio_en_fops);

	debugfs_create_file("crw_inject", 0200, cio_debugfs_dir,
			    NULL, &crw_fops);
	return 0;
}

device_initcall(cio_inject_init);

Annotation

• Immediate include surface: `linux/slab.h`, `linux/spinlock.h`, `linux/mm.h`, `linux/debugfs.h`, `asm/chpid.h`, `cio_inject.h`, `cio_debug.h`.
• Detected declarations: `function crw_inject`, `function stcrw_get_injected`, `function crw_inject_write`, `function enable_inject_write`, `function cio_inject_init`, `module init cio_inject_init`.
• Atlas domain: Driver Families / drivers/s390.
• Implementation status: pattern 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.