cmd/compile,runtime: dedup writeBarrier needed

[gostls13.git] / src / runtime / mgc.go

diff --git a/src/runtime/mgc.go b/src/runtime/mgc.go
index f7f7eb45287f261fc8af81d9f0a60a638d47ca94..8a4c58888ed4745bb1e6151434160193474a2fba 100644 (file)
--- a/src/runtime/mgc.go
+++ b/src/runtime/mgc.go
@@ -218,7 +218,6 @@ var gcphase uint32
 var writeBarrier struct {
        enabled bool    // compiler emits a check of this before calling write barrier
        pad     [3]byte // compiler uses 32-bit load for "enabled" field
-       needed  bool    // identical to enabled, for now (TODO: dedup)
        alignme uint64  // guarantee alignment so that compiler can use a 32 or 64-bit load
 }
 
@@ -236,8 +235,7 @@ const (
 //go:nosplit
 func setGCPhase(x uint32) {
        atomic.Store(&gcphase, x)
-       writeBarrier.needed = gcphase == _GCmark || gcphase == _GCmarktermination
-       writeBarrier.enabled = writeBarrier.needed
+       writeBarrier.enabled = gcphase == _GCmark || gcphase == _GCmarktermination
 }
 
 // gcMarkWorkerMode represents the mode that a concurrent mark worker