arch/s390/kernel/ftrace.h

File Facts

System

Linux kernel

Corpus path

arch/s390/kernel/ftrace.h

Extension

.h

Size

671 bytes

Lines

23

Domain

Architecture Layer

Bucket

arch/s390

Inferred role

Architecture Layer: implementation source

Status

source 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 or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• asm/types.h

Detected Declarations

• struct ftrace_hotpatch_trampoline

Annotated Snippet

struct ftrace_hotpatch_trampoline {
	u16 brasl_opc;
	s32 brasl_disp;
	s16: 16;
	u64 rest_of_intercepted_function;
	u64 interceptor;
} __packed;

extern struct ftrace_hotpatch_trampoline __ftrace_hotpatch_trampolines_start[];
extern struct ftrace_hotpatch_trampoline __ftrace_hotpatch_trampolines_end[];
extern const char ftrace_shared_hotpatch_trampoline_br[];
extern const char ftrace_shared_hotpatch_trampoline_br_end[];
extern const char ftrace_shared_hotpatch_trampoline_exrl[];
extern const char ftrace_shared_hotpatch_trampoline_exrl_end[];

#endif /* _FTRACE_H */

Annotation

• Immediate include surface: `asm/types.h`.
• Detected declarations: `struct ftrace_hotpatch_trampoline`.
• Atlas domain: Architecture Layer / arch/s390.
• Implementation status: source implementation candidate.

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.