diff --git a/fs/procfs/fs_procfsmeminfo.c b/fs/procfs/fs_procfsmeminfo.c
index f07a0ece67..852e4a60b2 100644
--- a/fs/procfs/fs_procfsmeminfo.c
+++ b/fs/procfs/fs_procfsmeminfo.c
@@ -454,6 +454,7 @@ static ssize_t memdump_write(FAR struct file *filep, FAR const char *buffer,
                              size_t buflen)
 {
   FAR struct procfs_meminfo_entry_s *entry;
+  FAR struct meminfo_file_s *procfile;
   struct mm_memdump_s dump =
     {
       PID_MM_ALLOC,
@@ -474,7 +475,8 @@ static ssize_t memdump_write(FAR struct file *filep, FAR const char *buffer,
 
   /* Recover our private data from the struct file instance */
 
-  DEBUGASSERT(filep->f_priv);
+  procfile = filep->f_priv;
+  DEBUGASSERT(procfile);
 
 #if CONFIG_MM_BACKTRACE > 0
   if (strcmp(buffer, "on") == 0)
diff --git a/mm/mm_heap/mm_foreach.c b/mm/mm_heap/mm_foreach.c
index 3ee8dda02f..04c886a8e4 100644
--- a/mm/mm_heap/mm_foreach.c
+++ b/mm/mm_heap/mm_foreach.c
@@ -55,7 +55,6 @@ void mm_foreach(FAR struct mm_heap_s *heap, mm_node_handler_t handler,
 #  define region 0
 #endif
 
-  UNUSED(prev);
   DEBUGASSERT(handler);
 
   /* Visit each region */
diff --git a/mm/mm_heap/mm_mallinfo.c b/mm/mm_heap/mm_mallinfo.c
index f1ca89edbc..090dc93636 100644
--- a/mm/mm_heap/mm_mallinfo.c
+++ b/mm/mm_heap/mm_mallinfo.c
@@ -65,7 +65,7 @@ static void mallinfo_handler(FAR struct mm_allocnode_s *node, FAR void *arg)
   else
     {
       FAR struct mm_freenode_s *fnode = (FAR void *)node;
-      UNUSED(fnode);
+
       DEBUGASSERT(nodesize >= MM_MIN_CHUNK);
       DEBUGASSERT(fnode->blink->flink == fnode);
       DEBUGASSERT(MM_SIZEOF_NODE(fnode->blink) <= nodesize);
diff --git a/mm/mm_heap/mm_memdump.c b/mm/mm_heap/mm_memdump.c
index 6b05f17f77..510a178574 100644
--- a/mm/mm_heap/mm_memdump.c
+++ b/mm/mm_heap/mm_memdump.c
@@ -104,7 +104,7 @@ static void memdump_handler(FAR struct mm_allocnode_s *node, FAR void *arg)
   else if (dump->pid == PID_MM_FREE)
     {
       FAR struct mm_freenode_s *fnode = (FAR void *)node;
-      UNUSED(fnode);
+
       DEBUGASSERT(nodesize >= MM_MIN_CHUNK);
       DEBUGASSERT(fnode->blink->flink == fnode);
       DEBUGASSERT(MM_SIZEOF_NODE(fnode->blink) <= nodesize);
diff --git a/sched/init/nx_bringup.c b/sched/init/nx_bringup.c
index f812d82471..b9922eb3b6 100644
--- a/sched/init/nx_bringup.c
+++ b/sched/init/nx_bringup.c
@@ -307,7 +307,6 @@ static inline void nx_start_application(void)
   posix_spawnattr_t attr;
 #endif
   int ret;
-  UNUSED(ret);
 
 #ifdef CONFIG_ETC_ROMFS
   nx_romfsetc();
diff --git a/sched/sched/sched_removeblocked.c b/sched/sched/sched_removeblocked.c
index 292180bf03..74c597c36f 100644
--- a/sched/sched/sched_removeblocked.c
+++ b/sched/sched/sched_removeblocked.c
@@ -55,10 +55,12 @@
 
 void nxsched_remove_blocked(FAR struct tcb_s *btcb)
 {
+  tstate_t task_state = btcb->task_state;
+
   /* Make sure the TCB is in a valid blocked state */
 
-  DEBUGASSERT(btcb->task_state >= FIRST_BLOCKED_STATE &&
-              btcb->task_state <= LAST_BLOCKED_STATE);
+  DEBUGASSERT(task_state >= FIRST_BLOCKED_STATE &&
+              task_state <= LAST_BLOCKED_STATE);
 
   /* Remove the TCB from the blocked task list associated
    * with this state