Merge tag 'v3.9-rc3' into v4l_for_linus

Linux 3.9-rc3

* tag 'v3.9-rc3': (11231 commits)
  Linux 3.9-rc3
  perf,x86: fix link failure for non-Intel configs
  perf,x86: fix wrmsr_on_cpu() warning on suspend/resume
  Btrfs: fix warning of free_extent_map
  perf,x86: fix kernel crash with PEBS/BTS after suspend/resume
  ALSA: hda - Fix missing EAPD/GPIO setup for Cirrus codecs
  sound: sequencer: cap array index in seq_chn_common_event()
  mfd: twl4030-madc: Remove __exit_p annotation
  ALSA: hda/ca0132 - Remove extra setting of dsp_state.
  ALSA: hda/ca0132 - Check download state of DSP.
  ALSA: hda/ca0132 - Check if dspload_image succeeded.
  mm/fremap.c: fix possible oops on error path
  list: Fix double fetch of pointer in hlist_entry_safe()
  Btrfs: fix warning when creating snapshots
  Btrfs: return as soon as possible when edquot happens
  Btrfs: return EIO if we have extent tree corruption
  btrfs: use rcu_barrier() to wait for bdev puts at unmount
  Btrfs: remove btrfs_try_spin_lock
  Btrfs: get better concurrency for snapshot-aware defrag work
  hwmon: (pmbus/ltc2978) Fix temperature reporting
  ...

1 files changed, 65 insertions, 0 deletions

diff --git a/kernel/workqueue_internal.h b/kernel/workqueue_internal.h
new file mode 100644
index 000000000000..07650264ec15
--- /dev/null
+++ b/kernel/workqueue_internal.h
@@ -0,0 +1,65 @@
+/*
+ * 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>
+
+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.
+ */
+void wq_worker_waking_up(struct task_struct *task, unsigned int cpu);
+struct task_struct *wq_worker_sleeping(struct task_struct *task,
+                                       unsigned int cpu);
+
+#endif /* _KERNEL_WORKQUEUE_INTERNAL_H */