title: How do I add an include path for kernel module makefile
body: <p>How do I add an include path for kernel module makefile? I want to include "test_kernel.h" in test_module.c.  the "test_kernel.h" resides in other directory "inc"
  I tried in the following solution in my Makefile but it does not work:</p>
  
  <pre><code>obj-m += test_module.o
  
  test_module:
      $(MAKE) -C "$(LINUX_DIR)" -Iinc $(MAKE_OPTS) modules
  </code></pre>