Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

[deliverable/linux.git] / kernel / workqueue_internal.h

diff --git a/kernel/workqueue_internal.h b/kernel/workqueue_internal.h
index b3ea6ad5566b023459499e69780a05ecb460c3a8..07650264ec15dd3212e1fb0ec421528d99eecc83 100644 (file)
--- a/kernel/workqueue_internal.h
+++ b/kernel/workqueue_internal.h
@@ -7,6 +7,53 @@
 #ifndef _KERNEL_WORKQUEUE_INTERNAL_H
 #define _KERNEL_WORKQUEUE_INTERNAL_H
 
+#include <linux/workqueue.h>
+#include <linux/kthread.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 */
+       struct task_struct      *task;          /* I: worker task */
+       struct worker_pool      *pool;          /* I: the associated pool */
+       /* 64 bytes boundary on 64bit, 32 on 32bit */
+       unsigned long           last_active;    /* L: last active timestamp */
+       unsigned int            flags;          /* X: flags */
+       int                     id;             /* I: worker id */
+
+       /* for rebinding worker to CPU */
+       struct work_struct      rebind_work;    /* L: for busy worker */
+
+       /* 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 (current->flags & PF_WQ_WORKER)
+               return kthread_data(current);
+       return NULL;
+}
+
 /*
  * Scheduler hooks for concurrency managed workqueue.  Only to be used from
  * sched.c and workqueue.c.