Documentation: teaching: labs: kernel_api: Fix indentation for exercises

Documentation/teaching/labs/kernel_api.rst

@@ -686,27 +686,27 @@ free them (in :c:func:`memory_exit`).
         :c:type:`struct task_struct` structure, returned by :c:macro:`current`
         macro.
 
-.. hint::
-          Search for :c:type:`pid` in :c:type:`task_struct`.
+      .. hint::
+                Search for :c:type:`pid` in :c:type:`task_struct`.
 
-* PID of the parent process of the current process.
+      * PID of the parent process of the current process.
 
-.. hint::
-          Search for the relevant field from :c:type:`struct task_struct`
-          structure. Look after "parent".
+      .. hint::
+                Search for the relevant field from :c:type:`struct task_struct`
+                structure. Look after "parent".
 
-* PID of the next process from the list of processes, relative to the
-  current process.
+      * PID of the next process from the list of processes, relative to the
+        current process.
 
-.. hint::
-          Use :c:macro:`next_task` macro, which returns a pointer to the next
-          process (i.e a :c:type:`struct task_struct` structure).
+      .. hint::
+                Use :c:macro:`next_task` macro, which returns a pointer to the next
+                process (i.e a :c:type:`struct task_struct` structure).
 
-* PID of the next process of the next process, relative to the current
-  process.
+      * PID of the next process of the next process, relative to the current
+        process.
 
-.. hint::
-          Call 2 times the :c:macro:`next_task`.
+      .. hint::
+                Call 2 times the :c:macro:`next_task`.
 
    3. (TODO 3) Display the four structures.
       * Use :c:func:`printk` to display their two fields:
@@ -798,9 +798,9 @@ following:
       expire. It must not satisfy a part of the expiration condition
       from :c:func:`task_info_remove_expired`.
 
-.. hint:: For ``TODO 2``, extract the first element from the list (the one
-	  referred by :c:member:`head.next`) and set the :c:member:`count`
-          field to a large enough value. Use :c:func:`atomic_set` function.
+      .. hint:: For ``TODO 2``, extract the first element from the list (the one
+                referred by :c:member:`head.next`) and set the :c:member:`count`
+                field to a large enough value. Use :c:func:`atomic_set` function.
 
 3. Compile, copy, load and unload the kernel module following the displayed
       messages.