failed sched_getaffinity_threads attempt

Better eigen naming.

kernel_module/user/eigen_hello.cpp

@@ -0,0 +1,13 @@
+/* https://github.com/cirosantilli/linux-kernel-module-cheat#eigen
+ * Adapted from: https://eigen.tuxfamily.org/dox/GettingStarted.html
+ */
+#include <iostream>
+#include <Eigen/Dense>
+int main() {
+	Eigen::MatrixXd m(2,2);
+	m(0,0) = 3;
+	m(1,0) = 2.5;
+	m(0,1) = -1;
+	m(1,1) = m(1,0) + m(0,1);
+	std::cout << m << std::endl;
+}