arch/powerpc/include/asm/preempt.h

File Facts

System

Linux kernel

Corpus path

arch/powerpc/include/asm/preempt.h

Extension

.h

Size

481 bytes

Lines

17

Domain

Architecture Layer

Bucket

arch/powerpc

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

• asm-generic/preempt.h
• linux/jump_label.h

Detected Declarations

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

Annotated Snippet

#ifndef __ASM_POWERPC_PREEMPT_H
#define __ASM_POWERPC_PREEMPT_H

#include <asm-generic/preempt.h>

#if defined(CONFIG_PREEMPT_DYNAMIC)
#include <linux/jump_label.h>
DECLARE_STATIC_KEY_TRUE(sk_dynamic_irqentry_exit_cond_resched);
#define need_irq_preemption() \
	(static_branch_unlikely(&sk_dynamic_irqentry_exit_cond_resched))
#else
#define need_irq_preemption()   (IS_ENABLED(CONFIG_PREEMPTION))
#endif

#endif /* __ASM_POWERPC_PREEMPT_H */

Annotation

• Immediate include surface: `asm-generic/preempt.h`, `linux/jump_label.h`.
• Atlas domain: Architecture Layer / arch/powerpc.
• 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.