/* 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;	/* 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 */	unsigned int		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 */ 	unsigned long		last_active;	/* K: 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/ 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 */