diff --git a/.ci/build-n-run.sh b/.ci/build-n-run.sh
new file mode 100755
index 0000000..4d9dc63
--- /dev/null
+++ b/.ci/build-n-run.sh
@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+function build_example()
+{   
+    make -C examples || exit 1
+}
+
+function list_mod()
+{
+    #following list will contain all file names which are not specified in file non-working.
+    echo `ls examples/*.ko | awk -F "[/|.]" '{print $2}' | grep -vFxf .ci/non-working`
+}
+
+#test module 2 times
+function run_mod()
+{
+    ( sudo insmod "examples/$1.ko" && sudo rmmod "$1" ) || exit 1;
+    ( sudo insmod "examples/$1.ko" && sudo rmmod "$1" ) || exit 1;
+}
+
+function run_examples()
+{
+    for module in $(list_mod); do
+        echo "$module"
+        run_mod "$module"
+    done
+}
+
+build_example
+run_examples
\ No newline at end of file
diff --git a/.ci/non-working b/.ci/non-working
new file mode 100644
index 0000000..bf7e848
--- /dev/null
+++ b/.ci/non-working
@@ -0,0 +1,3 @@
+bottomhalf
+intrpt
+kbleds
\ No newline at end of file
diff --git a/.github/workflows/generate_doc.yaml b/.github/workflows/generate_doc.yaml
index fe640fc..76f4f04 100644
--- a/.github/workflows/generate_doc.yaml
+++ b/.github/workflows/generate_doc.yaml
@@ -36,13 +36,14 @@ jobs:
           tag_name: "latest"
           prerelease: true
 
-  coding_style:
+  validate:
     runs-on: ubuntu-20.04
     steps:
       - name: checkout code
         uses: actions/checkout@v2
-      - name: style check
+      - name: validate coding style and functionality
         run: |
             sudo apt-get install -q -y clang-format-11
             sh .ci/check-format.sh
-        shell: bash
+            bash .ci/build-n-run.sh
+        shell: bash
\ No newline at end of file
diff --git a/examples/Makefile b/examples/Makefile
index d20a9e9..098f20b 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -3,8 +3,8 @@ obj-m += hello-2.o
 obj-m += hello-3.o
 obj-m += hello-4.o
 obj-m += hello-5.o
-obj-m += start.o
-obj-m += stop.o
+obj-m += startstop.o
+startstop-objs := start.o stop.o
 obj-m += chardev.o
 obj-m += procfs1.o
 obj-m += procfs2.o
@@ -30,6 +30,8 @@ obj-m += example_mutex.o
 obj-m += bottomhalf.o
 obj-m += ioctl.o
 
+PWD := $(CURDIR)
+
 all:
 	$(MAKE) -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules