diff options
Diffstat (limited to 'lib/kernel/src/dist_util.erl')
| -rw-r--r-- | lib/kernel/src/dist_util.erl | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/lib/kernel/src/dist_util.erl b/lib/kernel/src/dist_util.erl index 5871e7e8ee..5614b80802 100644 --- a/lib/kernel/src/dist_util.erl +++ b/lib/kernel/src/dist_util.erl @@ -215,8 +215,7 @@ check_dflags(#hs_data{other_node = Node, #erts_dflags{}=EDF) -> Mandatory = (EDF#erts_dflags.mandatory bor RequiredFlags), - Missing = check_mandatory(0, ?DFLAGS_ALL, Mandatory, - OtherFlags, []), + Missing = check_mandatory(Mandatory, OtherFlags, []), case Missing of [] -> ok; @@ -236,21 +235,20 @@ check_dflags(#hs_data{other_node = Node, ?shutdown2(Node, {check_dflags_failed, Missing}) end. -check_mandatory(_Bit, 0, _Mandatory, _OtherFlags, Missing) -> +check_mandatory(0, _OtherFlags, Missing) -> Missing; -check_mandatory(Bit, Left, Mandatory, OtherFlags, Missing) -> - DFlag = (1 bsl Bit), - NewLeft = Left band (bnot DFlag), - NewMissing = case {DFlag band Mandatory, - DFlag band OtherFlags} of - {DFlag, 0} -> +check_mandatory(Mandatory, OtherFlags, Missing) -> + Left = Mandatory band (Mandatory - 1), % clear lowest set bit + DFlag = Mandatory bxor Left, % only lowest set bit + NewMissing = case DFlag band OtherFlags of + 0 -> %% Mandatory and missing... [dflag2str(DFlag) | Missing]; _ -> - %% Not mandatory or present... + %% Mandatory and present... Missing end, - check_mandatory(Bit+1, NewLeft, Mandatory, OtherFlags, NewMissing). + check_mandatory(Left, OtherFlags, NewMissing). %% No nodedown will be sent if we fail before this process has |