xfs: remove i_iocount

We now have an i_dio_count filed and surrounding infrastructure to wait
for direct I/O completion instead of i_icount, and we have never needed
to iocount waits for buffered I/O given that we only set the page uptodate
after finishing all required work.  Thus remove i_iocount, and replace
the actually needed waits with calls to inode_dio_wait.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Alex Elder <aelder@sgi.com>


diff --git a/fs/xfs/xfs_sync.c b/fs/xfs/xfs_sync.c
index 90cc197..bf2b38c 100644
--- a/fs/xfs/xfs_sync.c
+++ b/fs/xfs/xfs_sync.c
@@ -227,21 +227,17 @@
 	int			error = 0;
 
 	if (!mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
-		goto out_wait;
+		return 0;
 
 	if (!xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED)) {
 		if (flags & SYNC_TRYLOCK)
-			goto out_wait;
+			return 0;
 		xfs_ilock(ip, XFS_IOLOCK_SHARED);
 	}
 
 	error = xfs_flush_pages(ip, 0, -1, (flags & SYNC_WAIT) ?
 				0 : XBF_ASYNC, FI_NONE);
 	xfs_iunlock(ip, XFS_IOLOCK_SHARED);
-
- out_wait:
-	if (flags & SYNC_WAIT)
-		xfs_ioend_wait(ip);
 	return error;
 }