1 files changed, 80 insertions, 0 deletions
diff --git a/kernel/workqueue_internal.h b/kernel/workqueue_internal.h
new file mode 100644
index 000000000..498de0e90
--- /dev/null
+++ b/kernel/workqueue_internal.h
@@ -0,0 +1,80 @@
+/* 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 */
+	int			sleeping;	/* None */
+
+	/*
+	 * 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 */
+
+	/* used by the scheduler to determine a worker's last known identity */
+	work_func_t		last_func;
+};
+
+/**
+ * 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);
+work_func_t wq_worker_last_func(struct task_struct *task);
+
+#endif /* _KERNEL_WORKQUEUE_INTERNAL_H */