+#ifndef HAVE_VFS_DQ_OFF
+# define ll_vfs_dq_init DQUOT_INIT
+# define ll_vfs_dq_drop DQUOT_DROP
+# define ll_vfs_dq_transfer DQUOT_TRANSFER
+# define ll_vfs_dq_off(sb, remount) DQUOT_OFF(sb)
+#else
+# define ll_vfs_dq_init vfs_dq_init
+# define ll_vfs_dq_drop vfs_dq_drop
+# define ll_vfs_dq_transfer vfs_dq_transfer
+# define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
+#endif
+
+#ifdef HAVE_BDI_INIT
+#define ll_bdi_init(bdi) bdi_init(bdi)
+#define ll_bdi_destroy(bdi) bdi_destroy(bdi)
+#else
+#define ll_bdi_init(bdi) 0
+#define ll_bdi_destroy(bdi) do { } while(0)
+#endif
+
+#ifdef HAVE_NEW_BACKING_DEV_INFO
+# define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
+#else
+# define ll_bdi_wb_cnt(bdi) 1
+#endif
+
+#ifdef HAVE_BLK_QUEUE_MAX_SECTORS /* removed in rhel6 */
+#define blk_queue_max_hw_sectors(q, sect) blk_queue_max_sectors(q, sect)
+#endif
+
+#ifndef HAVE_REQUEST_QUEUE_LIMITS
+#define queue_max_sectors(rq) ((rq)->max_sectors)
+#define queue_max_hw_sectors(rq) ((rq)->max_hw_sectors)
+#define queue_max_phys_segments(rq) ((rq)->max_phys_segments)
+#define queue_max_hw_segments(rq) ((rq)->max_hw_segments)
+#endif
+
+#ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
+#define blk_queue_max_segments(rq, seg) \
+ do { blk_queue_max_phys_segments(rq, seg); \
+ blk_queue_max_hw_segments(rq, seg); } while (0)
+#else
+#define queue_max_phys_segments(rq) queue_max_segments(rq)
+#define queue_max_hw_segments(rq) queue_max_segments(rq)
+#endif
+
+
+#ifndef HAVE_BI_HW_SEGMENTS
+#define bio_hw_segments(q, bio) 0
+#endif
+