arch/powerpc/lib/qspinlock.c
Source file repositories/reference/linux-study-clean/arch/powerpc/lib/qspinlock.c
File Facts
- System
- Linux kernel
- Corpus path
arch/powerpc/lib/qspinlock.c- Extension
.c- Size
- 24172 bytes
- Lines
- 999
- Domain
- Architecture Layer
- Bucket
- arch/powerpc
- Inferred role
- Architecture Layer: exported/initcall integration point
- Status
- integration 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.
- Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
- 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/bug.hlinux/compiler.hlinux/export.hlinux/percpu.hlinux/processor.hlinux/smp.hlinux/topology.hlinux/sched/clock.hasm/qspinlock.hasm/paravirt.htrace/events/lock.hlinux/debugfs.h
Detected Declarations
struct qnodestruct qnodesfunction recently_sleepyfunction get_steal_spinsfunction get_remote_steal_spinsfunction get_head_spinsfunction encode_tail_cpufunction decode_tail_cpufunction get_owner_cpufunction trylock_clean_tailfunction get_tail_qnodefunction set_mustqfunction clear_mustqfunction try_set_sleepyfunction seen_sleepy_ownerfunction seen_sleepy_lockfunction seen_sleepy_nodefunction __yield_to_locked_ownerfunction yield_to_locked_ownerfunction yield_head_to_locked_ownerfunction propagate_sleepyfunction yield_to_prevfunction steal_breakfunction try_to_steal_lockfunction queued_spin_lock_mcs_queuefunction queued_spin_lock_slowpathfunction pv_spinlocks_initfunction steal_spins_getfunction remote_steal_spins_setfunction remote_steal_spins_getfunction head_spins_setfunction head_spins_getfunction pv_yield_owner_setfunction pv_yield_owner_getfunction pv_yield_allow_steal_setfunction pv_yield_allow_steal_getfunction pv_spin_on_preempted_owner_setfunction pv_spin_on_preempted_owner_getfunction pv_sleepy_lock_setfunction pv_sleepy_lock_getfunction pv_sleepy_lock_sticky_setfunction pv_sleepy_lock_sticky_getfunction pv_sleepy_lock_interval_ns_setfunction pv_sleepy_lock_interval_ns_getfunction pv_sleepy_lock_factor_setfunction pv_sleepy_lock_factor_getfunction pv_yield_prev_setfunction pv_yield_prev_get
Annotated Snippet
device_initcall(spinlock_debugfs_init);Annotation
- Immediate include surface: `linux/bug.h`, `linux/compiler.h`, `linux/export.h`, `linux/percpu.h`, `linux/processor.h`, `linux/smp.h`, `linux/topology.h`, `linux/sched/clock.h`.
- Detected declarations: `struct qnode`, `struct qnodes`, `function recently_sleepy`, `function get_steal_spins`, `function get_remote_steal_spins`, `function get_head_spins`, `function encode_tail_cpu`, `function decode_tail_cpu`, `function get_owner_cpu`, `function trylock_clean_tail`.
- Atlas domain: Architecture Layer / arch/powerpc.
- Implementation status: integration 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.