Eliminate some new warnings found in build testing.

arch/arm/src/lc823450/lc823450_dma.c

@@ -156,7 +156,7 @@ static int dma_interrupt_core(void *context)
 
   flags = spin_lock_irqsave();
   q_ent = pdmach->req_q.tail;
-  DEBUGASSERT(q_ent);
+  DEBUGASSERT(q_ent != NULL);
   dmach = (struct lc823450_dmach_s *)q_ent;
 
   if (dmach->nxfrs == 0)
@@ -461,7 +461,7 @@ void lc823450_dmarequest(DMA_HANDLE handle, uint8_t dmarequest)
         break;
       default:
         dmaerr("ERROR: Not implemetned\n");
-        DEBUGASSERT(0);
+        DEBUGPANIC();
     }
 
   putreg32(val, DMACCFG(dmach->chn));
@@ -545,7 +545,8 @@ void lc823450_dmafree(DMA_HANDLE handle)
 {
   struct lc823450_dmach_s *dmach = (DMA_HANDLE)handle;
 
-  DEBUGASSERT(dmach);
+  DEBUGASSERT(dmach != NULL);
+  UNUSED(dmach);
 
   /* Make sure that the DMA channel was properly stopped */
 
@@ -571,7 +572,7 @@ int lc823450_dmasetup(DMA_HANDLE handle, uint32_t control,
 {
   struct lc823450_dmach_s *dmach = (DMA_HANDLE)handle;
 
-  DEBUGASSERT(dmach);
+  DEBUGASSERT(dmach != NULL);
 
   dmach->srcaddr = srcaddr;
   dmach->destaddr = destaddr;
@@ -587,7 +588,7 @@ int lc823450_dmallsetup(DMA_HANDLE handle, uint32_t control,
 {
   struct lc823450_dmach_s *dmach = (DMA_HANDLE)handle;
 
-  DEBUGASSERT(dmach);
+  DEBUGASSERT(dmach != NULL);
 
   dmach->srcaddr = srcaddr;
   dmach->destaddr = destaddr;
@@ -618,7 +619,7 @@ int lc823450_dmastart(DMA_HANDLE handle, dma_callback_t callback, void *arg)
   struct lc823450_dmach_s *dmach = (DMA_HANDLE)handle;
   irqstate_t flags;
 
-  DEBUGASSERT(dmach);
+  DEBUGASSERT(dmach != NULL);
 
   /* select physical channel */
 
@@ -651,7 +652,7 @@ void lc823450_dmastop(DMA_HANDLE handle)
   struct lc823450_phydmach_s *pdmach;
   irqstate_t flags;
 
-  DEBUGASSERT(dmach);
+  DEBUGASSERT(dmach != NULL);
 
   flags = spin_lock_irqsave();
 

arch/arm/src/lc823450/lc823450_irq.c

@@ -343,6 +343,7 @@ static void lc823450_extint_initialize(void)
 
   ret = irq_attach(LC823450_IRQ_EXTINT5, lc823450_extint_isr, NULL);
   DEBUGASSERT(ret == OK);
+  UNUSED(ret);
 
   up_enable_irq(LC823450_IRQ_EXTINT0);
   up_enable_irq(LC823450_IRQ_EXTINT1);

drivers/audio/i2schar.c

@@ -149,7 +149,9 @@ static void i2schar_rxcallback(FAR struct i2s_dev_s *dev,
 {
   FAR struct i2schar_dev_s *priv = (FAR struct i2schar_dev_s *)arg;
 
-  DEBUGASSERT(priv && apb);
+  DEBUGASSERT(priv != NULL && apb != NULL);
+  UNUSED(priv);
+
   i2sinfo("apb=%p nbytes=%d result=%d\n", apb, apb->nbytes, result);
 
   /* REVISIT: If you want this to actually do something other than
@@ -184,7 +186,9 @@ static void i2schar_txcallback(FAR struct i2s_dev_s *dev,
 {
   FAR struct i2schar_dev_s *priv = (FAR struct i2schar_dev_s *)arg;
 
-  DEBUGASSERT(priv && apb);
+  DEBUGASSERT(priv != NULL && apb != NULL);
+  UNUSED(priv);
+
   i2sinfo("apb=%p nbytes=%d result=%d\n", apb, apb->nbytes, result);
 
   /* REVISIT: If you want this to actually do something other than
@@ -221,13 +225,13 @@ static ssize_t i2schar_read(FAR struct file *filep, FAR char *buffer,
 
   /* Get our private data structure */
 
-  DEBUGASSERT(filep && buffer);
+  DEBUGASSERT(filep != NULL && buffer != NULL);
 
   inode = filep->f_inode;
-  DEBUGASSERT(inode);
+  DEBUGASSERT(inode != NULL);
 
   priv = (FAR struct i2schar_dev_s *)inode->i_private;
-  DEBUGASSERT(priv);
+  DEBUGASSERT(priv != NULL);
 
   /* Verify that the buffer refers to one, correctly sized audio buffer */
 
@@ -363,13 +367,13 @@ static int i2schar_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
   /* Get our private data structure */
 
-  DEBUGASSERT(filep);
+  DEBUGASSERT(filep != NULL);
 
   inode = filep->f_inode;
-  DEBUGASSERT(inode);
+  DEBUGASSERT(inodei != NULL);
 
   priv = (FAR struct i2schar_dev_s *)inode->i_private;
-  DEBUGASSERT(priv && priv->i2s && priv->i2s->ops);
+  DEBUGASSERT(priv != NULL && priv->i2s && priv->i2s->ops);
 
   if (priv->i2s->ops->i2s_ioctl)
     {