As we conclude, here is a list of questions for you to test your knowledge
regarding this chapter's material. You will find answers to selected
questions here:
https://github.com/PacktPublishing/Linux-Kernel-Programming_2E/tree/main/solutions_to_assgn

Chapter 12 : Questions and/or Assignments

1. miscdrv_rdwr_mutextrylock: 
   
   Modify the book's
    ch12/1_miscdrv_rdwr_mutexlock/miscdrv_rdwr_mutexlock.c
   device driver so that it uses the *trylock* variant of the mutex lock in
   the driver's write() method. If the lock is not acquired, perform some
   "work" – a hex dump of the driver "context" structure, perhaps ("busy-loop"
   over this).
   
2. (If you haven't already done so) Prepare a "debug" kernel (go back to
   Chapter 5, Writing Your First Kernel Module – LKMs Part 2, the
   'Configuring a "debug" kernel' section) and, as explained in the
   'Testing the buggy module on a 6.1 debug kernel' section, run our
   ch12/2_miscdrv_rdwr_spinlock buggy driver test case on it (by setting
   the module parameter 'buggy' to 1).