var runtime.emptymspan

5 uses

	runtime (current package)
		mcache.go#L84: var emptymspan mspan
		mcache.go#L95: 		c.alloc[i] = &emptymspan
		mcache.go#L155: 	if s != &emptymspan {
		mcache.go#L277: 		if s != &emptymspan {
		mcache.go#L301: 			c.alloc[i] = &emptymspan