bmap_to_share_mode
fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap);
access = bmap_to_share_mode(ols->st_access_bmap);
deny = bmap_to_share_mode(ols->st_deny_bmap);
reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp);
if (!(access & bmap_to_share_mode(bmap)))