diff --git a/fs/inode/fs_files.c b/fs/inode/fs_files.c
index 62682e7cc2..4dfe6143ce 100644
--- a/fs/inode/fs_files.c
+++ b/fs/inode/fs_files.c
@@ -59,18 +59,6 @@ static int _files_semtake(FAR struct filelist *list)
  * Public Functions
  ****************************************************************************/
 
-/****************************************************************************
- * Name: files_initialize
- *
- * Description:
- *   This is called from the FS initialization logic to configure the files.
- *
- ****************************************************************************/
-
-void files_initialize(void)
-{
-}
-
 /****************************************************************************
  * Name: files_initlist
  *
diff --git a/fs/inode/fs_inode.c b/fs/inode/fs_inode.c
index 1e8793f549..1306734755 100644
--- a/fs/inode/fs_inode.c
+++ b/fs/inode/fs_inode.c
@@ -90,15 +90,6 @@ void inode_initialize(void)
   /* Reserve the root node */
 
   inode_root_reserve();
-
-  /* Initialize files array (if it is used) */
-
-#ifdef CONFIG_HAVE_WEAKFUNCTIONS
-  if (files_initialize != NULL)
-#endif
-    {
-      files_initialize();
-    }
 }
 
 /****************************************************************************
diff --git a/fs/inode/inode.h b/fs/inode/inode.h
index 07681e9e8c..b618a1b7f7 100644
--- a/fs/inode/inode.h
+++ b/fs/inode/inode.h
@@ -367,16 +367,6 @@ void inode_release(FAR struct inode *inode);
 
 int foreach_inode(foreach_inode_t handler, FAR void *arg);
 
-/****************************************************************************
- * Name: files_initialize
- *
- * Description:
- *   This is called from the FS initialization logic to configure the files.
- *
- ****************************************************************************/
-
-void weak_function files_initialize(void);
-
 /****************************************************************************
  * Name: files_allocate
  *
diff --git a/net/mld/mld.h b/net/mld/mld.h
index f33a0b40d6..7a89131cb0 100644
--- a/net/mld/mld.h
+++ b/net/mld/mld.h
@@ -228,17 +228,6 @@ struct mld_mcast_listen_report_v1_s; /* Forward reference */
 struct mld_mcast_listen_report_v2_s; /* Forward reference */
 struct mld_mcast_listen_done_s;      /* Forward reference */
 
-/****************************************************************************
- * Name: mld_initialize()
- *
- * Description:
- *   Initialize the MLD structures.  Called once and only from the
- *   networking layer.
- *
- ****************************************************************************/
-
-void mld_initialize(void);
-
 /****************************************************************************
  * Name:  mld_devinit
  *
diff --git a/net/mld/mld_initialize.c b/net/mld/mld_initialize.c
index bdef733ebb..8eda702a5b 100644
--- a/net/mld/mld_initialize.c
+++ b/net/mld/mld_initialize.c
@@ -42,18 +42,6 @@
  * Public Functions
  ****************************************************************************/
 
-/****************************************************************************
- * Name:  mld_initialize
- *
- * Description:
- *   Perform one-time MLD initialization.
- *
- ****************************************************************************/
-
-void mld_initialize(void)
-{
-}
-
 /****************************************************************************
  * Name:  mld_devinit
  *
diff --git a/net/net_initialize.c b/net/net_initialize.c
index a23f1abc30..6836989efb 100644
--- a/net/net_initialize.c
+++ b/net/net_initialize.c
@@ -36,7 +36,6 @@
 #include "sixlowpan/sixlowpan.h"
 #include "icmp/icmp.h"
 #include "icmpv6/icmpv6.h"
-#include "mld/mld.h"
 #include "tcp/tcp.h"
 #include "udp/udp.h"
 #include "pkt/pkt.h"
@@ -84,12 +83,6 @@ void net_initialize(void)
   net_lockinitialize();
 
 #ifdef CONFIG_NET_IPv6
-#ifdef CONFIG_NET_MLD
-  /* Initialize ICMPv6 Multicast Listener Discovery (MLD) logic */
-
-  mld_initialize();
-#endif
-
 #ifdef CONFIG_NET_6LOWPAN
   /* Initialize 6LoWPAN data structures */
 
diff --git a/sched/init/nx_start.c b/sched/init/nx_start.c
index 492fcce2b8..7c0e6bbb08 100644
--- a/sched/init/nx_start.c
+++ b/sched/init/nx_start.c
@@ -52,9 +52,6 @@
 #ifndef CONFIG_DISABLE_MQUEUE
 #  include "mqueue/mqueue.h"
 #endif
-#ifndef CONFIG_DISABLE_PTHREAD
-#  include "pthread/pthread.h"
-#endif
 #include "clock/clock.h"
 #include "timer/timer.h"
 #include "irq/irq.h"
@@ -658,17 +655,6 @@ void nx_start(void)
     }
 #endif
 
-#ifndef CONFIG_DISABLE_PTHREAD
-  /* Initialize the thread-specific data facility (if in link) */
-
-#ifdef CONFIG_HAVE_WEAKFUNCTIONS
-  if (pthread_initialize != NULL)
-#endif
-    {
-      pthread_initialize();
-    }
-#endif
-
 #ifdef CONFIG_NET
   /* Initialize the networking system */
 
diff --git a/sched/pthread/pthread.h b/sched/pthread/pthread.h
index e1ce892ad6..a2ca182879 100644
--- a/sched/pthread/pthread.h
+++ b/sched/pthread/pthread.h
@@ -78,7 +78,6 @@ extern "C"
 struct pthread_tcb_s; /* Forward reference */
 struct task_group_s;  /* Forward reference */
 
-void weak_function pthread_initialize(void);
 int pthread_setup_scheduler(FAR struct pthread_tcb_s *tcb, int priority,
                             start_t start, pthread_startroutine_t entry);
 
diff --git a/sched/pthread/pthread_initialize.c b/sched/pthread/pthread_initialize.c
index 620542619c..d8af297f27 100644
--- a/sched/pthread/pthread_initialize.c
+++ b/sched/pthread/pthread_initialize.c
@@ -37,26 +37,6 @@
  * Public Functions
  ****************************************************************************/
 
-/****************************************************************************
- * Name: pthread_initialize
- *
- * Description:
- *   This is an internal OS function called only at power-up boot time.  It
- *   no longer does anything since all of the pthread data structures have
- *   been moved into the "task group"
- *
- * Input Parameters:
- *   None
- *
- * Returned Value:
- *   None
- *
- ****************************************************************************/
-
-void pthread_initialize(void)
-{
-}
-
 /****************************************************************************
  * Name: pthread_sem_take, pthread_sem_trytake, and
  *       pthread_sem_give