btrfs: fix not enough reserved space

[mv-sheeva.git] / block / blk-settings.c

diff --git a/block/blk-settings.c b/block/blk-settings.c
index f5ed5a1187ba8564527b70f682328b31eea4549a..a234f4bf1d6ffb7dda8a71593c3f777aa66baec0 100644 (file)
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -36,6 +36,23 @@ void blk_queue_prep_rq(struct request_queue *q, prep_rq_fn *pfn)
 }
 EXPORT_SYMBOL(blk_queue_prep_rq);
 
+/**
+ * blk_queue_unprep_rq - set an unprepare_request function for queue
+ * @q:         queue
+ * @ufn:       unprepare_request function
+ *
+ * It's possible for a queue to register an unprepare_request callback
+ * which is invoked before the request is finally completed. The goal
+ * of the function is to deallocate any data that was allocated in the
+ * prepare_request callback.
+ *
+ */
+void blk_queue_unprep_rq(struct request_queue *q, unprep_rq_fn *ufn)
+{
+       q->unprep_rq_fn = ufn;
+}
+EXPORT_SYMBOL(blk_queue_unprep_rq);
+
 /**
  * blk_queue_merge_bvec - set a merge_bvec function for queue
  * @q:         queue