sched: Remove the unnecessary weak_function

because not all compiler support the weak attribute, and
many features are either always used or guarded by config.

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

sched/clock/clock.h

@@ -76,9 +76,11 @@ extern struct timespec   g_basetime;
 
 int  clock_basetime(FAR struct timespec *tp);
 
-void weak_function clock_initialize(void);
+void clock_initialize(void);
 #ifndef CONFIG_SCHED_TICKLESS
-void weak_function clock_timer(void);
+void clock_timer(void);
+#else
+#  define clock_timer()
 #endif
 
 int  clock_abstime2ticks(clockid_t clockid,

sched/group/group.h

@@ -67,7 +67,9 @@ extern FAR struct task_group_s *g_group_current[CONFIG_SMP_NCPUS];
  ****************************************************************************/
 
 #ifdef CONFIG_SCHED_CHILD_STATUS
-void weak_function task_initialize(void);
+void task_initialize(void);
+#else
+#  define task_initialize()
 #endif
 
 /* Task group data structure management */

sched/init/nx_start.c

@@ -564,16 +564,9 @@ void nx_start(void)
 
   g_nx_initstate = OSINIT_MEMORY;
 
-#if defined(CONFIG_SCHED_HAVE_PARENT) && defined(CONFIG_SCHED_CHILD_STATUS)
   /* Initialize tasking data structures */
 
-#ifdef CONFIG_HAVE_WEAKFUNCTIONS
-  if (task_initialize != NULL)
-#endif
-    {
   task_initialize();
-    }
-#endif
 
   /* Disables context switching because we need take the memory manager
    * semaphore on this CPU so that it will not be available on the other
@@ -588,49 +581,24 @@ void nx_start(void)
 
   /* Initialize the interrupt handling subsystem (if included) */
 
-#ifdef CONFIG_HAVE_WEAKFUNCTIONS
-  if (irq_initialize != NULL)
-#endif
-    {
   irq_initialize();
-    }
 
   /* Initialize the POSIX timer facility (if included in the link) */
 
-#ifdef CONFIG_HAVE_WEAKFUNCTIONS
-  if (clock_initialize != NULL)
-#endif
-    {
   clock_initialize();
-    }
 
 #ifndef CONFIG_DISABLE_POSIX_TIMERS
-#ifdef CONFIG_HAVE_WEAKFUNCTIONS
-  if (timer_initialize != NULL)
-#endif
-    {
   timer_initialize();
-    }
 #endif
 
   /* Initialize the signal facility (if in link) */
 
-#ifdef CONFIG_HAVE_WEAKFUNCTIONS
-  if (nxsig_initialize != NULL)
-#endif
-    {
   nxsig_initialize();
-    }
 
 #ifndef CONFIG_DISABLE_MQUEUE
   /* Initialize the named message queue facility (if in link) */
 
-#ifdef CONFIG_HAVE_WEAKFUNCTIONS
-  if (nxmq_initialize != NULL)
-#endif
-    {
   nxmq_initialize();
-    }
 #endif
 
 #ifdef CONFIG_NET

sched/irq/irq.h

@@ -142,7 +142,7 @@ extern "C"
  *
  ****************************************************************************/
 
-void weak_function irq_initialize(void);
+void irq_initialize(void);
 
 /****************************************************************************
  * Name: irq_unexpected_isr

sched/mqueue/mq_rcvinternal.c

@@ -251,7 +251,7 @@ int nxmq_wait_receive(FAR struct mqueue_inode_s *msgq,
 
 ssize_t nxmq_do_receive(FAR struct mqueue_inode_s *msgq,
                         FAR struct mqueue_msg_s *mqmsg,
-                        FAR char *ubuffer, unsigned int *prio)
+                        FAR char *ubuffer, FAR unsigned int *prio)
 {
   FAR struct tcb_s *btcb;
   ssize_t rcvmsglen;

sched/mqueue/mqueue.h

@@ -106,7 +106,7 @@ struct task_group_s; /* Forward reference */
 
 /* Functions defined in mq_initialize.c *****************************************/
 
-void weak_function nxmq_initialize(void);
+void nxmq_initialize(void);
 void nxmq_free_msg(FAR struct mqueue_msg_s *mqmsg);
 
 /* mq_waitirq.c *****************************************************************/
@@ -124,7 +124,7 @@ int nxmq_wait_receive(FAR struct mqueue_inode_s *msgq,
                       int oflags, FAR struct mqueue_msg_s **rcvmsg);
 ssize_t nxmq_do_receive(FAR struct mqueue_inode_s *msgq,
                         FAR struct mqueue_msg_s *mqmsg,
-                        FAR char *ubuffer, unsigned int *prio);
+                        FAR char *ubuffer, FAR unsigned int *prio);
 
 /* mq_sndinternal.c *************************************************************/
 

sched/sched/sched_processtimer.c

@@ -218,12 +218,7 @@ void nxsched_process_timer(void)
 
   /* Increment the system time (if in the link) */
 
-#ifdef CONFIG_HAVE_WEAKFUNCTIONS
-  if (clock_timer != NULL)
-#endif
-    {
   clock_timer();
-    }
 
 #ifndef CONFIG_SCHED_CPULOAD_EXTCLK
   /* Perform CPU load measurements (before any timer-initiated context

sched/sched/sched_releasetcb.c

@@ -108,12 +108,7 @@ int nxsched_release_tcb(FAR struct tcb_s *tcb, uint8_t ttype)
        * disabled here).
        */
 
-#ifdef CONFIG_HAVE_WEAKFUNCTIONS
-      if (timer_deleteall != NULL)
-#endif
-        {
       timer_deleteall(tcb->pid);
-        }
 #endif
 
       /* Release the task's process ID if one was assigned.  PID

sched/signal/signal.h

@@ -147,7 +147,7 @@ struct task_group_s;
 
 /* sig_initializee.c */
 
-void weak_function nxsig_initialize(void);
+void               nxsig_initialize(void);
 
 /* sig_action.c */
 

sched/timer/timer.h

@@ -81,8 +81,8 @@ extern volatile sq_queue_t g_alloctimers;
  * Public Function Prototypes
  ****************************************************************************/
 
-void weak_function timer_initialize(void);
+void timer_initialize(void);
-void weak_function timer_deleteall(pid_t pid);
+void timer_deleteall(pid_t pid);
 int timer_release(FAR struct posix_timer_s *timer);
 
 #endif /* __SCHED_TIMER_TIMER_H */

sched/timer/timer_initialize.c

@@ -81,7 +81,7 @@ volatile sq_queue_t g_alloctimers;
  *
  ****************************************************************************/
 
-void weak_function timer_initialize(void)
+void timer_initialize(void)
 {
 #if CONFIG_PREALLOC_TIMERS > 0
   int i;
@@ -122,7 +122,7 @@ void weak_function timer_initialize(void)
  *
  ****************************************************************************/
 
-void weak_function timer_deleteall(pid_t pid)
+void timer_deleteall(pid_t pid)
 {
   FAR struct posix_timer_s *timer;
   FAR struct posix_timer_s *next;