block: remove BLKDEV_IFL_WAIT

All the blkdev_issue_* helpers can only sanely be used for synchronous
caller.  To issue cache flushes or barriers asynchronously the caller needs
to set up a bio by itself with a completion callback to move the asynchronous
state machine ahead.  So drop the BLKDEV_IFL_WAIT flag that is always
specified when calling blkdev_issue_* and also remove the now unused flags
argument to blkdev_issue_flush and blkdev_issue_zeroout.  For
blkdev_issue_discard we need to keep it for the secure discard flag, which
gains a more descriptive name and loses the bitops vs flag confusion.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c
index f9a0b7ae8648..b47d2c9f4fa1 100644
--- a/fs/fat/fatent.c
+++ b/fs/fat/fatent.c
@@ -578,8 +578,7 @@ int fat_free_clusters(struct inode *inode, int cluster)
                                 sb_issue_discard(sb,
                                         fat_clus_to_blknr(sbi, first_cl),
                                         nr_clus * sbi->sec_per_clus,
-                                        GFP_NOFS,
-                                        BLKDEV_IFL_WAIT);
+                                        GFP_NOFS, 0);
 
                                 first_cl = cluster;
                         }