| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * 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 |
| |
| #include <linux/workqueue.h> |
| #include <linux/kthread.h> |
| #include <linux/preempt.h> |
| |
| 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 */ |
| struct pool_workqueue *current_pwq; /* L: current_work's pwq */ |
| struct list_head scheduled; /* L: scheduled works */ |
| |
| /* 64 bytes boundary on 64bit, 32 on 32bit */ |
| |
| struct task_struct *task; /* I: worker task */ |
| struct worker_pool *pool; /* A: the associated pool */ |
| /* L: for rescuers */ |
| struct list_head node; /* A: anchored at pool->workers */ |
| /* A: runs through worker->node */ |
| |
| unsigned long last_active; /* L: last active timestamp */ |
| unsigned int flags; /* X: flags */ |
| int id; /* I: worker id */ |
| |
| /* |
| * Opaque string set with work_set_desc(). Printed out with task |
| * dump for debugging - WARN, BUG, panic or sysrq. |
| */ |
| char desc[WORKER_DESC_LEN]; |
| |
| /* used only by rescuers to point to the target workqueue */ |
| struct workqueue_struct *rescue_wq; /* I: the workqueue to rescue */ |
| }; |
| |
| /** |
| * current_wq_worker - return struct worker if %current is a workqueue worker |
| */ |
| static inline struct worker *current_wq_worker(void) |
| { |
| if (in_task() && (current->flags & PF_WQ_WORKER)) |
| return kthread_data(current); |
| return NULL; |
| } |
| |
| /* |
| * Scheduler hooks for concurrency managed workqueue. Only to be used from |
| * sched/core.c and workqueue.c. |
| */ |
| void wq_worker_waking_up(struct task_struct *task, int cpu); |
| struct task_struct *wq_worker_sleeping(struct task_struct *task); |
| |
| #endif /* _KERNEL_WORKQUEUE_INTERNAL_H */ |