var runtime.emptymspan

5 uses

	runtime (current package)
		mcache.go#L85: var emptymspan mspan
		mcache.go#L96: 		c.alloc[i] = &emptymspan
		mcache.go#L156: 	if s != &emptymspan {
		mcache.go#L278: 		if s != &emptymspan {
		mcache.go#L302: 			c.alloc[i] = &emptymspan