arch/um/include/shared/smp.h

File Facts

System

Linux kernel

Corpus path

arch/um/include/shared/smp.h

Extension

.h

Size

369 bytes

Lines

21

Domain

Architecture Layer

Bucket

arch/um

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.

Dependency Surface

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

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef __UM_SHARED_SMP_H
#define __UM_SHARED_SMP_H

#if IS_ENABLED(CONFIG_SMP)

extern int uml_ncpus;

int uml_curr_cpu(void);
void uml_start_secondary(void *opaque);
void uml_ipi_handler(int vector);

#else /* !CONFIG_SMP */

#define uml_ncpus 1
#define uml_curr_cpu() 0

#endif /* CONFIG_SMP */

#endif /* __UM_SHARED_SMP_H */

Annotation

• Atlas domain: Architecture Layer / arch/um.
• 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.