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-rw-r--r--src/runtime/mgc.go7
1 files changed, 4 insertions, 3 deletions
diff --git a/src/runtime/mgc.go b/src/runtime/mgc.go
index df8b4536fa..138a623ca5 100644
--- a/src/runtime/mgc.go
+++ b/src/runtime/mgc.go
@@ -216,9 +216,10 @@ var gcphase uint32
// The compiler knows about this variable.
// If you change it, you must change the compiler too.
var writeBarrier struct {
- enabled bool // compiler emits a check of this before calling write barrier
- needed bool // whether we need a write barrier for current GC phase
- cgo bool // whether we need a write barrier for a cgo check
+ enabled bool // compiler emits a check of this before calling write barrier
+ needed bool // whether we need a write barrier for current GC phase
+ cgo bool // whether we need a write barrier for a cgo check
+ alignme uint64 // guarantee alignment so that compiler can use a 32 or 64-bit load
}
// gcBlackenEnabled is 1 if mutator assists and background mark