[XFS] make pagebuf_workqueue private to page_buf.c

SGI Modid: 2.5.x-xfs:slinx:134185a

fs/xfs/pagebuf/page_buf.c

@@ -120,6 +120,8 @@ pb_trace_func(
 STATIC kmem_cache_t *pagebuf_cache;
 STATIC pagebuf_daemon_t *pb_daemon;
 STATIC void pagebuf_daemon_wakeup(int);
+STATIC struct workqueue_struct *pagebuf_workqueue;
+
 
 /*
  * Pagebuf module configuration parameters, exported via
@@ -137,11 +139,6 @@ pagebuf_param_t pb_params = {{ HZ, 15 * HZ, 0, 0 }};
 
 struct pbstats pbstats;
 
-/*
- * Queue for delayed I/O completion.
- */
-struct workqueue_struct *pagebuf_workqueue;
-
 /*
  * Pagebuf allocation / freeing.
  */

fs/xfs/pagebuf/page_buf.h

@@ -386,6 +386,4 @@ static __inline__ void pagebuf_run_task_queue(page_buf_t *pb)
 	blk_run_queues();
 }
 
-extern struct workqueue_struct *pagebuf_workqueue;
-
 #endif /* __PAGE_BUF_H__ */