func golang.org/x/sys/unix.sendfile

2 uses

	golang.org/x/sys/unix (current package)
		syscall_linux.go#L1786: 	return sendfile(outfd, infd, offset, count)
		zsyscall_linux_amd64.go#L304: func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {