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, 2 insertions, 2 deletions

diff --git a/block/ioctl.c b/block/ioctl.c
index d8052f0dabd3..cb2b9099862b 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -116,7 +116,7 @@ static int blkdev_reread_part(struct block_device *bdev)
 static int blk_ioctl_discard(struct block_device *bdev, uint64_t start,
                              uint64_t len, int secure)
 {
-        unsigned long flags = BLKDEV_IFL_WAIT;
+        unsigned long flags = 0;
 
         if (start & 511)
                 return -EINVAL;
@@ -128,7 +128,7 @@ static int blk_ioctl_discard(struct block_device *bdev, uint64_t start,
         if (start + len > (bdev->bd_inode->i_size >> 9))
                 return -EINVAL;
         if (secure)
-                flags |= BLKDEV_IFL_SECURE;
+                flags |= BLKDEV_DISCARD_SECURE;
         return blkdev_issue_discard(bdev, start, len, GFP_KERNEL, flags);
 }