arch/s390/kernel/diag/diag324.c

File Facts

System

Linux kernel

Corpus path

arch/s390/kernel/diag/diag324.c

Extension

.c

Size

4749 bytes

Lines

225

Domain

Architecture Layer

Bucket

arch/s390

Inferred role

Architecture Layer: exported/initcall integration point

Status

integration 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/fs.h
• linux/gfp.h
• linux/ioctl.h
• linux/jiffies.h
• linux/kernel.h
• linux/ktime.h
• linux/string.h
• linux/slab.h
• linux/timer.h
• linux/types.h
• linux/uaccess.h
• linux/vmalloc.h
• asm/diag.h
• asm/sclp.h
• asm/timex.h
• uapi/asm/diag.h
• diag_ioctl.h

Detected Declarations

• struct pib
• struct pibdata
• enum subcode
• enum retcode
• function diag324
• function pibwork_handler
• function pib_update
• function diag324_pibbuf
• function diag324_piblen
• function diag324_init
• module init diag324_init

Annotated Snippet

device_initcall(diag324_init);

Annotation

• Immediate include surface: `linux/fs.h`, `linux/gfp.h`, `linux/ioctl.h`, `linux/jiffies.h`, `linux/kernel.h`, `linux/ktime.h`, `linux/string.h`, `linux/slab.h`.
• Detected declarations: `struct pib`, `struct pibdata`, `enum subcode`, `enum retcode`, `function diag324`, `function pibwork_handler`, `function pib_update`, `function diag324_pibbuf`, `function diag324_piblen`, `function diag324_init`.
• Atlas domain: Architecture Layer / arch/s390.
• Implementation status: integration implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.
• 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.