Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block

* 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block: (46 commits)
  xen-blkfront: disable barrier/flush write support
  Added blk-lib.c and blk-barrier.c was renamed to blk-flush.c
  block: remove BLKDEV_IFL_WAIT
  aic7xxx_old: removed unused 'req' variable
  block: remove the BH_Eopnotsupp flag
  block: remove the BLKDEV_IFL_BARRIER flag
  block: remove the WRITE_BARRIER flag
  swap: do not send discards as barriers
  fat: do not send discards as barriers
  ext4: do not send discards as barriers
  jbd2: replace barriers with explicit flush / FUA usage
  jbd2: Modify ASYNC_COMMIT code to not rely on queue draining on barrier
  jbd: replace barriers with explicit flush / FUA usage
  nilfs2: replace barriers with explicit flush / FUA usage
  reiserfs: replace barriers with explicit flush / FUA usage
  gfs2: replace barriers with explicit flush / FUA usage
  btrfs: replace barriers with explicit flush / FUA usage
  xfs: replace barriers with explicit flush / FUA usage
  block: pass gfp_mask and flags to sb_issue_discard
  dm: convey that all flushes are processed as empty
  ...

1 files changed, 8 insertions, 10 deletions

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index ffa0689ee84..20514c47a5a 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2109,7 +2109,7 @@ static int sd_revalidate_disk(struct gendisk *disk)
         struct scsi_disk *sdkp = scsi_disk(disk);
         struct scsi_device *sdp = sdkp->device;
         unsigned char *buffer;
-        unsigned ordered;
+        unsigned flush = 0;
 
         SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp,
                                       "sd_revalidate_disk\n"));
@@ -2151,17 +2151,15 @@ static int sd_revalidate_disk(struct gendisk *disk)
 
         /*
          * We now have all cache related info, determine how we deal
-         * with ordered requests.  Note that as the current SCSI
-         * dispatch function can alter request order, we cannot use
-         * QUEUE_ORDERED_TAG_* even when ordered tag is supported.
+         * with flush requests.
          */
-        if (sdkp->WCE)
-                ordered = sdkp->DPOFUA
-                        ? QUEUE_ORDERED_DRAIN_FUA : QUEUE_ORDERED_DRAIN_FLUSH;
-        else
-                ordered = QUEUE_ORDERED_DRAIN;
+        if (sdkp->WCE) {
+                flush |= REQ_FLUSH;
+                if (sdkp->DPOFUA)
+                        flush |= REQ_FUA;
+        }
 
-        blk_queue_ordered(sdkp->disk->queue, ordered);
+        blk_queue_flush(sdkp->disk->queue, flush);
 
         set_capacity(disk, sdkp->capacity);
         kfree(buffer);