1 /* 2 * kernel/workqueue_internal.h 3 * 4 * Workqueue internal header file. Only to be included by workqueue and 5 * core kernel subsystems. 6 */ 7 #ifndef _KERNEL_WORKQUEUE_INTERNAL_H 8 #define _KERNEL_WORKQUEUE_INTERNAL_H 9 10 #include <linux/workqueue.h> 11 #include <linux/kthread.h> 12 13 struct worker_pool; 14 15 /* 16 * The poor guys doing the actual heavy lifting. All on-duty workers are 17 * either serving the manager role, on idle list or on busy hash. For 18 * details on the locking annotation (L, I, X...), refer to workqueue.c. 19 * 20 * Only to be used in workqueue and async. 21 */ 22 struct worker { 23 /* on idle list while idle, on busy hash table while busy */ 24 union { 25 struct list_head entry; /* L: while idle */ 26 struct hlist_node hentry; /* L: while busy */ 27 }; 28 29 struct work_struct *current_work; /* L: work being processed */ 30 work_func_t current_func; /* L: current_work's fn */ 31 struct pool_workqueue *current_pwq; /* L: current_work's pwq */ 32 struct list_head scheduled; /* L: scheduled works */ 33 struct task_struct *task; /* I: worker task */ 34 struct worker_pool *pool; /* I: the associated pool */ 35 /* L: for rescuers */ 36 /* 64 bytes boundary on 64bit, 32 on 32bit */ 37 unsigned long last_active; /* L: last active timestamp */ 38 unsigned int flags; /* X: flags */ 39 int id; /* I: worker id */ 40 41 /* for rebinding worker to CPU */ 42 struct work_struct rebind_work; /* L: for busy worker */ 43 44 /* used only by rescuers to point to the target workqueue */ 45 struct workqueue_struct *rescue_wq; /* I: the workqueue to rescue */ 46 }; 47 48 /** 49 * current_wq_worker - return struct worker if %current is a workqueue worker 50 */ 51 static inline struct worker *current_wq_worker(void) 52 { 53 if (current->flags & PF_WQ_WORKER) 54 return kthread_data(current); 55 return NULL; 56 } 57 58 /* 59 * Scheduler hooks for concurrency managed workqueue. Only to be used from 60 * sched.c and workqueue.c. 61 */ 62 void wq_worker_waking_up(struct task_struct *task, int cpu); 63 struct task_struct *wq_worker_sleeping(struct task_struct *task, int cpu); 64 65 #endif /* _KERNEL_WORKQUEUE_INTERNAL_H */ 66