const runtime.spanAllocWorkBuf

5 uses

	runtime (current package)
		mgcwork.go#L375: 				s = mheap_.allocManual(workbufAlloc/pageSize, spanAllocWorkBuf)
		mgcwork.go#L477: 			mheap_.freeManual(span, spanAllocWorkBuf)
		mheap.go#L887: 	spanAllocWorkBuf                            // work buf span
		mheap.go#L1301: 	case spanAllocWorkBuf:
		mheap.go#L1505: 	case spanAllocWorkBuf: