diff --git a/sched/pthread_join.c b/sched/pthread_join.c
index 6a02af352e..d3f648dc77 100644
--- a/sched/pthread_join.c
+++ b/sched/pthread_join.c
@@ -123,7 +123,7 @@ int pthread_join(pthread_t thread, FAR pthread_addr_t *pexit_value)
    * This can fail for one of three reasons:  (1) There is no
    * thread associated with 'thread,' (2) the thread is a task
    * and does not have join information, or (3) the thread
-   * was detached and has exitted.
+   * was detached and has exited.
    */
 
   pjoin = pthread_findjoininfo((pid_t)thread);
diff --git a/sched/sched_waitid.c b/sched/sched_waitid.c
index e73bc223c7..56bfb36f0c 100644
--- a/sched/sched_waitid.c
+++ b/sched/sched_waitid.c
@@ -54,16 +54,16 @@
  *****************************************************************************/
 
 /*****************************************************************************
- * Name: exitted_child
+ * Name: exited_child
  *
  * Description:
- *   Handle the case where a child exitted properlay was we (apparently) lost
+ *   Handle the case where a child exited properlay was we (apparently) lost
  *   the detch of child signal.
  *
  *****************************************************************************/
 
 #ifdef CONFIG_SCHED_CHILD_STATUS
-static void exitted_child(FAR _TCB *rtcb, FAR struct child_status_s *child,
+static void exited_child(FAR _TCB *rtcb, FAR struct child_status_s *child,
                           FAR siginfo_t *info)
 {
   /* The child has exited. Return the saved exit status (and some fudged
@@ -271,11 +271,11 @@ int waitid(idtype_t idtype, id_t id, FAR siginfo_t *info, int options)
 
           if (retains && (child = task_exitchild(rtcb)) != NULL)
             {
-              /* A child has exitted.  Apparently we missed the signal.
+              /* A child has exited.  Apparently we missed the signal.
                * Return the exit status and break out of the loop.
                */
 
-              exitted_child(rtcb, child, info);
+              exited_child(rtcb, child, info);
               break;
             }
         }
@@ -297,7 +297,7 @@ int waitid(idtype_t idtype, id_t id, FAR siginfo_t *info, int options)
                * of the loop.
                */
 
-              exitted_child(rtcb, child, info);
+              exited_child(rtcb, child, info);
               break;
             }
         }
diff --git a/sched/sched_waitpid.c b/sched/sched_waitpid.c
index ecdc60a2c2..d7484fca9d 100644
--- a/sched/sched_waitpid.c
+++ b/sched/sched_waitpid.c
@@ -384,13 +384,13 @@ pid_t waitpid(pid_t pid, int *stat_loc, int options)
           DEBUGASSERT(!retains || rtcb->children);
           if (retains && (child = task_exitchild(rtcb)) != NULL)
             {
-              /* A child has exitted.  Apparently we missed the signal.
+              /* A child has exited.  Apparently we missed the signal.
                * Return the saved exit status.
                */
 
               /* The child has exited. Return the saved exit status */
 
-              *stat_loc = child->ch_status;
+              *stat_loc = child->ch_status << 8;
 
               /* Discard the child entry and break out of the loop */
 
@@ -415,7 +415,7 @@ pid_t waitpid(pid_t pid, int *stat_loc, int options)
             {
               /* The child has exited. Return the saved exit status */
 
-              *stat_loc = child->ch_status;
+              *stat_loc = child->ch_status << 8;
 
               /* Discard the child entry and break out of the loop */
 
@@ -452,7 +452,7 @@ pid_t waitpid(pid_t pid, int *stat_loc, int options)
        */
 
       if (rtcb->nchildren == 0 ||
-          (pid != (pid_t)-1 && (ret = kill((pid_t)id, 0)) < 0))
+          (pid != (pid_t)-1 && (ret = kill(pid, 0)) < 0))
         {
           /* We know that the child task was running okay we stared,
            * so we must have lost the signal.  What can we do?
@@ -481,7 +481,7 @@ pid_t waitpid(pid_t pid, int *stat_loc, int options)
         {
           /* Yes... return the status and PID (in the event it was -1) */
 
-          *stat_loc = info.si_status;
+          *stat_loc = info.si_status << 8;
           pid = info.si_pid;
           break;
         }
diff --git a/sched/task_childstatus.c b/sched/task_childstatus.c
index 09aa48135b..6007f03e57 100644
--- a/sched/task_childstatus.c
+++ b/sched/task_childstatus.c
@@ -121,7 +121,7 @@ static void task_dumpchildren(FAR _TCB *tcb, FAR const char *msg)
     }
 }
 #else
-#  task_dumpchildren(t,m)
+#  define task_dumpchildren(t,m)
 #endif
 
 /*****************************************************************************
@@ -320,7 +320,7 @@ FAR struct child_status_s *task_exitchild(FAR _TCB *tcb)
 {
   FAR struct child_status_s *child;
 
-  /* Find the status structure with the matching PID  */
+  /* Find the status structure of any child task that has exitted. */
 
   for (child = tcb->children; child; child = child->flink)
     {
diff --git a/sched/timer_initialize.c b/sched/timer_initialize.c
index 05980bb1a8..2651469ef6 100644
--- a/sched/timer_initialize.c
+++ b/sched/timer_initialize.c
@@ -137,7 +137,7 @@ void weak_function timer_initialize(void)
  *   resources are referenced.
  *
  * Parameters:
- *   pid - the task ID of the thread that exitted
+ *   pid - the task ID of the thread that exited
  *
  * Return Value:
  *   None