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/suballoc.c b/fs/ocfs2/suballoc.c
index f0056b7..c5ff18b 100644
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -1172,8 +1172,7 @@
 	struct ocfs2_group_desc *gd;
 	struct inode *alloc_inode = ac->ac_inode;
 
-	ret = ocfs2_read_block(alloc_inode, gd_blkno,
-			       &group_bh, OCFS2_BH_CACHED);
+	ret = ocfs2_read_block(alloc_inode, gd_blkno, &group_bh);
 	if (ret < 0) {
 		mlog_errno(ret);
 		return ret;
@@ -1244,7 +1243,7 @@
 
 	status = ocfs2_read_block(alloc_inode,
 				  le64_to_cpu(cl->cl_recs[chain].c_blkno),
-				  &group_bh, OCFS2_BH_CACHED);
+				  &group_bh);
 	if (status < 0) {
 		mlog_errno(status);
 		goto bail;
@@ -1273,8 +1272,7 @@
 		prev_group_bh = group_bh;
 		group_bh = NULL;
 		status = ocfs2_read_block(alloc_inode,
-					  next_group, &group_bh,
-					  OCFS2_BH_CACHED);
+					  next_group, &group_bh);
 		if (status < 0) {
 			mlog_errno(status);
 			goto bail;
@@ -1795,8 +1793,7 @@
 	     (unsigned long long)OCFS2_I(alloc_inode)->ip_blkno, count,
 	     (unsigned long long)bg_blkno, start_bit);
 
-	status = ocfs2_read_block(alloc_inode, bg_blkno, &group_bh,
-				  OCFS2_BH_CACHED);
+	status = ocfs2_read_block(alloc_inode, bg_blkno, &group_bh);
 	if (status < 0) {
 		mlog_errno(status);
 		goto bail;