/* 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
/* * 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; /* K: work being processed and its */
work_func_t current_func; /* K: function */ struct pool_workqueue *current_pwq; /* K: pwq */
u64 current_at; /* K: runtime at start or last wakeup */ unsignedint current_color; /* K: color */
int sleeping; /* S: is worker sleeping? */
/* used by the scheduler to determine a worker's last known identity */
work_func_t last_func; /* K: last work's fn */
struct list_head scheduled; /* L: scheduled works */
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 */
unsignedlong last_active; /* K: last active timestamp */ unsignedint flags; /* L: 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
*/ staticinlinestruct 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/ and workqueue.c.
*/ void wq_worker_running(struct task_struct *task); void wq_worker_sleeping(struct task_struct *task); void wq_worker_tick(struct task_struct *task);
work_func_t wq_worker_last_func(struct task_struct *task);
#endif/* _KERNEL_WORKQUEUE_INTERNAL_H */
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