References: internal/runtime/syscall.EPOLL_CTL

const internal/runtime/syscall.EPOLL_CTL_MOD

one use

	internal/runtime/syscall (current package)
		defs_linux.go#L17: 	EPOLL_CTL_MOD = 0x3

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