var runtime.emptymspan

5 uses

	runtime (current package)
		mcache.go#L83: var emptymspan mspan
		mcache.go#L94: 		c.alloc[i] = &emptymspan
		mcache.go#L154: 	if s != &emptymspan {
		mcache.go#L268: 		if s != &emptymspan {
		mcache.go#L292: 			c.alloc[i] = &emptymspan