start the big userland migration

userland/gcc/empty_struct.c

@@ -1,4 +1,4 @@
-/* Empty struct */
+/* https://github.com/cirosantilli/linux-kernel-module-cheat#c-empty-struct */
 
 #include <assert.h>
 #include <stdlib.h>

userland/gcc/openmp.c

@@ -0,0 +1,20 @@
+/* https://github.com/cirosantilli/linux-kernel-module-cheat#openmp */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <omp.h>
+
+int main (void) {
+    int nthreads, tid;
+#pragma omp parallel private(nthreads, tid)
+    {
+        tid = omp_get_thread_num();
+        printf("Hello World from thread = %d\n", tid);
+        if (tid == 0) {
+            nthreads = omp_get_num_threads();
+            printf("Number of threads = %d\n", nthreads);
+        }
+    }
+    return EXIT_SUCCESS;
+}