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kernel/workqueue_internal.h
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/* SPDX-License-Identifier: GPL-2.0 */ |
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/* * kernel/workqueue_internal.h * * Workqueue internal header file. Only to be included by workqueue and * core kernel subsystems. */ #ifndef _KERNEL_WORKQUEUE_INTERNAL_H #define _KERNEL_WORKQUEUE_INTERNAL_H |
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#include <linux/workqueue.h> |
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#include <linux/kthread.h> |
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#include <linux/preempt.h> |
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struct worker_pool; /* * The poor guys doing the actual heavy lifting. All on-duty workers are * either serving the manager role, on idle list or on busy hash. For * details on the locking annotation (L, I, X...), refer to workqueue.c. * * Only to be used in workqueue and async. */ struct worker { /* on idle list while idle, on busy hash table while busy */ union { struct list_head entry; /* L: while idle */ struct hlist_node hentry; /* L: while busy */ }; struct work_struct *current_work; /* L: work being processed */ work_func_t current_func; /* L: current_work's fn */ |
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struct pool_workqueue *current_pwq; /* L: current_work's pwq */ |
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struct list_head scheduled; /* L: scheduled works */ |
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/* 64 bytes boundary on 64bit, 32 on 32bit */ |
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struct task_struct *task; /* I: worker task */ |
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struct worker_pool *pool; /* A: the associated pool */ |
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/* L: for rescuers */ |
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struct list_head node; /* A: anchored at pool->workers */ /* A: runs through worker->node */ |
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unsigned long last_active; /* L: last active timestamp */ unsigned int flags; /* X: flags */ int id; /* I: worker id */ |
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int sleeping; /* None */ |
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/* * Opaque string set with work_set_desc(). Printed out with task * dump for debugging - WARN, BUG, panic or sysrq. */ char desc[WORKER_DESC_LEN]; |
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/* used only by rescuers to point to the target workqueue */ struct workqueue_struct *rescue_wq; /* I: the workqueue to rescue */ |
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/* used by the scheduler to determine a worker's last known identity */ work_func_t last_func; |
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}; |
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/** * current_wq_worker - return struct worker if %current is a workqueue worker */ static inline struct worker *current_wq_worker(void) { |
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if (in_task() && (current->flags & PF_WQ_WORKER)) |
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return kthread_data(current); return NULL; } |
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/* * Scheduler hooks for concurrency managed workqueue. Only to be used from |
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* sched/ and workqueue.c. |
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*/ |
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void wq_worker_running(struct task_struct *task); void wq_worker_sleeping(struct task_struct *task); |
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work_func_t wq_worker_last_func(struct task_struct *task); |
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#endif /* _KERNEL_WORKQUEUE_INTERNAL_H */ |