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/extent_map.c b/fs/ocfs2/extent_map.c
index 5b48221..2baedac 100644
--- a/fs/ocfs2/extent_map.c
+++ b/fs/ocfs2/extent_map.c
@@ -293,8 +293,7 @@
 	struct ocfs2_extent_block *eb;
 	struct ocfs2_extent_list *el;
 
-	ret = ocfs2_read_block(inode, last_eb_blk,
-			       &eb_bh, OCFS2_BH_CACHED);
+	ret = ocfs2_read_block(inode, last_eb_blk, &eb_bh);
 	if (ret) {
 		mlog_errno(ret);
 		goto out;
@@ -384,7 +383,7 @@
 
 		ret = ocfs2_read_block(inode,
 				       le64_to_cpu(eb->h_next_leaf_blk),
-				       &next_eb_bh, OCFS2_BH_CACHED);
+				       &next_eb_bh);
 		if (ret) {
 			mlog_errno(ret);
 			goto out;
@@ -631,8 +630,7 @@
 	if (ret == 0)
 		goto out;
 
-	ret = ocfs2_read_block(inode, OCFS2_I(inode)->ip_blkno,
-			       &di_bh, OCFS2_BH_CACHED);
+	ret = ocfs2_read_block(inode, OCFS2_I(inode)->ip_blkno, &di_bh);
 	if (ret) {
 		mlog_errno(ret);
 		goto out;