var runtime.emptymspan

5 uses

	runtime (current package)
		mcache.go#L82: var emptymspan mspan
		mcache.go#L93: 		c.alloc[i] = &emptymspan
		mcache.go#L153: 	if s != &emptymspan {
		mcache.go#L259: 		if s != &emptymspan {
		mcache.go#L277: 			c.alloc[i] = &emptymspan