ocfs2: Simplify ocfs2_read_block()

More than 30 callers of ocfs2_read_block() pass exactly OCFS2_BH_CACHED.
Only six pass a different flag set.  Rather than have every caller care,
let's make ocfs2_read_block() take no flags and always do a cached read.
The remaining six places can call ocfs2_read_blocks() directly.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 3b2cd0f..ec68442 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -2024,8 +2024,7 @@
 	} else {
 		/* Boo, we have to go to disk. */
 		/* read bh, cast, ocfs2_refresh_inode */
-		status = ocfs2_read_block(inode, oi->ip_blkno,
-					  bh, OCFS2_BH_CACHED);
+		status = ocfs2_read_block(inode, oi->ip_blkno, bh);
 		if (status < 0) {
 			mlog_errno(status);
 			goto bail_refresh;
@@ -2086,10 +2085,7 @@
 		return 0;
 	}
 
-	status = ocfs2_read_block(inode,
-				  OCFS2_I(inode)->ip_blkno,
-				  ret_bh,
-				  OCFS2_BH_CACHED);
+	status = ocfs2_read_block(inode, OCFS2_I(inode)->ip_blkno, ret_bh);
 	if (status < 0)
 		mlog_errno(status);