const runtime.waitReasonGCAssistMarking

3 uses

	runtime (current package)
		mgcmark.go#L563: 	casGToWaiting(gp, _Grunning, waitReasonGCAssistMarking)
		runtime2.go#L1059: 	waitReasonGCAssistMarking                         // "GC assist marking"
		runtime2.go#L1094: 	waitReasonGCAssistMarking:       "GC assist marking",