Fix some missing header file inclusions and a misplaced semi-colon from recent commits

include/sched.h

@@ -67,6 +67,7 @@
 #define PTHREAD_KEYS_MAX CONFIG_NPTHREAD_KEYS
 
 /* CPU affinity mask helpers ***************************************************/
+/* These are not standard but are defined for Linux compatibility */
 
 #ifdef CONFIG_SMP
 
@@ -88,7 +89,7 @@
 
 /* int CPU_COUNT(FAR const cpu_set_t *set); */
 
-#define CPU_COUNT(s) sched_cpu_count(s)
+#  define CPU_COUNT(s) sched_cpu_count(s)
 
 /* void CPU_AND(FAR cpu_set_t *destset, FAR const cpu_set_t *srcset1,
  *              FAR const cpu_set_t *srcset2);
@@ -112,6 +113,7 @@
 
 #  define CPU_EQUAL(s1,s2) (*(s2) == *(s2))
 
+/* REVISIT: Variably sized CPU sets are not supported */
 /* FAR cpu_set_t *CPU_ALLOC(int num_cpus); */
 
 #  define CPU_ALLOC(n) (FAR cpu_set_t *)malloc(sizeof(cpu_set_t));

libc/pthread/pthread_attrgetaffinity.c

@@ -40,6 +40,7 @@
 #include <sys/types.h>
 #include <pthread.h>
 #include <debug.h>
+#include <assert.h>
 #include <errno.h>
 
 /****************************************************************************

libc/pthread/pthread_attrsetaffinity.c

@@ -41,6 +41,7 @@
 
 #include <pthread.h>
 #include <debug.h>
+#include <assert.h>
 #include <errno.h>
 
 /****************************************************************************

libc/sched/sched_cpucount.c

@@ -62,7 +62,7 @@
  *
  ****************************************************************************/
 
-int sched_cpu_count(FAR const cpu_set_t *set);
+int sched_cpu_count(FAR const cpu_set_t *set)
 {
   int count;
   int cpu;

sched/pthread/pthread_create.c

@@ -412,7 +412,7 @@ int pthread_create(FAR pthread_t *thread, FAR const pthread_attr_t *attr,
    * parent thread's affinity mask.
    */
 
-   if ( attr->affinity != 0)
+   if (attr->affinity != 0)
      {
        ptcb->cmn.affinity = attr->affinity;
      }

sched/task/task_setup.c

@@ -163,8 +163,8 @@ static int task_assignpid(FAR struct tcb_s *tcb)
  *   None
  *
  * Assumptions:
- *   The parent of the new task is the task at the head of the ready-to-run
- *   list.
+ *   The parent of the new task is the task at the head of the assigned task
+ *   list for the current CPU.
  *
  ****************************************************************************/