arch/um/include/asm/smp.h

File Facts

System

Linux kernel

Corpus path

arch/um/include/asm/smp.h

Extension

.h

Size

397 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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/cpumask.h
• shared/smp.h

Detected Declarations

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

Annotated Snippet

#ifndef __UM_SMP_H
#define __UM_SMP_H

#if IS_ENABLED(CONFIG_SMP)

#include <linux/cpumask.h>
#include <shared/smp.h>

#define raw_smp_processor_id() uml_curr_cpu()

void arch_smp_send_reschedule(int cpu);

void arch_send_call_function_single_ipi(int cpu);

void arch_send_call_function_ipi_mask(const struct cpumask *mask);

#endif /* CONFIG_SMP */

#endif

Annotation

• Immediate include surface: `linux/cpumask.h`, `shared/smp.h`.
• 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.