arch/powerpc/include/asm/qspinlock.h

File Facts

System

Linux kernel

Corpus path

arch/powerpc/include/asm/qspinlock.h

Extension

.h

Size

4871 bytes

Lines

175

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/compiler.h
• asm/qspinlock_types.h
• asm/paravirt.h

Detected Declarations

• function queued_spin_is_locked
• function queued_spin_value_unlocked
• function queued_spin_is_contended
• function queued_spin_encode_locked_val
• function __queued_spin_trylock_nosteal
• function __queued_spin_trylock_steal
• function queued_spin_trylock
• function queued_spin_lock
• function queued_spin_unlock
• function pv_spinlocks_init

Annotated Snippet

static inline void pv_spinlocks_init(void) { }
#endif

#endif /* _ASM_POWERPC_QSPINLOCK_H */

Annotation

• Immediate include surface: `linux/compiler.h`, `asm/qspinlock_types.h`, `asm/paravirt.h`.
• Detected declarations: `function queued_spin_is_locked`, `function queued_spin_value_unlocked`, `function queued_spin_is_contended`, `function queued_spin_encode_locked_val`, `function __queued_spin_trylock_nosteal`, `function __queued_spin_trylock_steal`, `function queued_spin_trylock`, `function queued_spin_lock`, `function queued_spin_unlock`, `function pv_spinlocks_init`.
• Atlas domain: Architecture Layer / arch/powerpc.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.