include/linux/cpuhotplug.h

File Facts

System

Linux kernel

Corpus path

include/linux/cpuhotplug.h

Extension

.h

Size

17301 bytes

Lines

527

Domain

Core OS

Bucket

Core Kernel Interface

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h

Detected Declarations

• struct task_struct
• enum cpuhp_state
• function cpuhp_setup_state
• function cpuhp_setup_state
• function cpuhp_setup_state
• function cpus_read_lock
• function cpuhp_state_add_instance
• function cpuhp_setup_state_multi
• function cpuhp_state_add_instance_nocalls
• function cpus_read_lock
• function cpuhp_remove_state
• function cpuhp_remove_state_nocalls
• function cpus_read_lock
• function cpuhp_setup_state_multi
• function cpuhp_state_remove_instance
• function cpuhp_state_remove_instance_nocalls
• function cpuhp_online_idle
• function cpuhp_ap_report_dead

Annotated Snippet

static inline void cpuhp_online_idle(enum cpuhp_state state) { }
#endif

struct task_struct;

void cpuhp_ap_sync_alive(void);
void arch_cpuhp_sync_state_poll(void);
void arch_cpuhp_cleanup_kick_cpu(unsigned int cpu);
int arch_cpuhp_kick_ap_alive(unsigned int cpu, struct task_struct *tidle);
bool arch_cpuhp_init_parallel_bringup(void);

#ifdef CONFIG_HOTPLUG_CORE_SYNC_DEAD
void cpuhp_ap_report_dead(void);
void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu);
#else
static inline void cpuhp_ap_report_dead(void) { }
static inline void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu) { }
#endif

#endif

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct task_struct`, `enum cpuhp_state`, `function cpuhp_setup_state`, `function cpuhp_setup_state`, `function cpuhp_setup_state`, `function cpus_read_lock`, `function cpuhp_state_add_instance`, `function cpuhp_setup_state_multi`, `function cpuhp_state_add_instance_nocalls`, `function cpus_read_lock`.
• Atlas domain: Core OS / Core Kernel Interface.
• Implementation status: source implementation candidate.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.