OCFS2_XATTR_BLOCK_CREATE_CREDITS
credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
*xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
ctxt.handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS);
*xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;