References: internal/runtime/syscall.SYS_EPOLL

const internal/runtime/syscall.SYS_EPOLL_PWAIT2

one use

	internal/runtime/syscall (current package)
		defs_linux_amd64.go#L15: 	SYS_EPOLL_PWAIT2  = 441

The pages are generated with Golds v0.7.6. (GOOS=linux GOARCH=amd64)