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/buffer_head_io.h b/fs/ocfs2/buffer_head_io.h
index fd0d774..a2ef9e5 100644
--- a/fs/ocfs2/buffer_head_io.h
+++ b/fs/ocfs2/buffer_head_io.h
@@ -33,8 +33,7 @@
 
 static inline int ocfs2_read_block(struct inode	       *inode,
 				   u64                  off,
-				   struct buffer_head **bh,
-				   int                  flags);
+				   struct buffer_head **bh);
 
 int ocfs2_write_block(struct ocfs2_super          *osb,
 		      struct buffer_head  *bh,
@@ -54,7 +53,7 @@
 #define OCFS2_BH_READAHEAD         8
 
 static inline int ocfs2_read_block(struct inode *inode, u64 off,
-				   struct buffer_head **bh, int flags)
+				   struct buffer_head **bh)
 {
 	int status = 0;
 
@@ -64,7 +63,7 @@
 		goto bail;
 	}
 
-	status = ocfs2_read_blocks(inode, off, 1, bh, flags);
+	status = ocfs2_read_blocks(inode, off, 1, bh, OCFS2_BH_CACHED);
 
 bail:
 	return status;