arch/s390/include/asm/ccwgroup.h

File Facts

System

Linux kernel

Corpus path

arch/s390/include/asm/ccwgroup.h

Extension

.h

Size

2300 bytes

Lines

76

Domain

Architecture Layer

Bucket

arch/s390

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.
• 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

• No C-style include directives detected by the generator.

Detected Declarations

• struct ccw_device
• struct ccw_driver
• struct ccwgroup_device
• struct ccwgroup_driver
• function dev_is_ccwgroup

Annotated Snippet

struct device_driver driver;
	struct ccw_driver *ccw_driver;
};

extern int  ccwgroup_driver_register   (struct ccwgroup_driver *cdriver);
extern void ccwgroup_driver_unregister (struct ccwgroup_driver *cdriver);
int ccwgroup_create_dev(struct device *root, struct ccwgroup_driver *gdrv,
			int num_devices, const char *buf);

extern int ccwgroup_set_online(struct ccwgroup_device *gdev);
int ccwgroup_set_offline(struct ccwgroup_device *gdev, bool call_gdrv);

extern int ccwgroup_probe_ccwdev(struct ccw_device *cdev);
extern void ccwgroup_remove_ccwdev(struct ccw_device *cdev);

#define to_ccwgroupdev(x) container_of((x), struct ccwgroup_device, dev)
#define to_ccwgroupdrv(x) container_of((x), struct ccwgroup_driver, driver)

#if IS_ENABLED(CONFIG_CCWGROUP)
bool dev_is_ccwgroup(struct device *dev);
#else /* CONFIG_CCWGROUP */
static inline bool dev_is_ccwgroup(struct device *dev)
{
	return false;
}
#endif /* CONFIG_CCWGROUP */

#endif

Annotation

• Detected declarations: `struct ccw_device`, `struct ccw_driver`, `struct ccwgroup_device`, `struct ccwgroup_driver`, `function dev_is_ccwgroup`.
• Atlas domain: Architecture Layer / arch/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.