Squashed commit of the following:

libc/semaphore:  Add nxsem_getvalue() which is identical to sem_getvalue() except that it never modifies the errno variable.  Changed all references to sem_getvalue in the OS to nxsem_getvalue().

    sched/semaphore:  Rename all internal private functions from sem_xyz to nxsem_xyz.  The sem_ prefix is (will be) reserved only for the application semaphore interfaces.

    libc/semaphore:  Add nxsem_init() which is identical to sem_init() except that it never modifies the errno variable.  Changed all references to sem_init in the OS to nxsem_init().

    sched/semaphore:  Rename sem_tickwait() to nxsem_tickwait() so that it is clear this is an internal OS function.

    sched/semaphoate:  Rename sem_reset() to nxsem_reset() so that it is clear this is an internal OS function.

arch/arm/src/efm32/efm32_dma.c

@@ -274,8 +274,8 @@ void weak_function up_dmainitialize(void)
 
   /* Initialize the channel list  */
 
-  sem_init(&g_dmac.exclsem, 0, 1);
-  sem_init(&g_dmac.chansem, 0, EFM32_DMA_NCHANNELS);
+  nxsem_init(&g_dmac.exclsem, 0, 1);
+  nxsem_init(&g_dmac.chansem, 0, EFM32_DMA_NCHANNELS);
 
   for (i = 0; i < EFM32_DMA_NCHANNELS; i++)
     {

arch/arm/src/efm32/efm32_i2c.c

@@ -673,14 +673,14 @@ static inline void efm32_i2c_sem_post(FAR struct efm32_i2c_priv_s *priv)
 
 static inline void efm32_i2c_sem_init(FAR struct efm32_i2c_priv_s *priv)
 {
-  sem_init(&priv->sem_excl, 0, 1);
+  nxsem_init(&priv->sem_excl, 0, 1);
 
 #ifndef CONFIG_I2C_POLLED
   /* This semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.
    */
 
-  sem_init(&priv->sem_isr, 0, 0);
+  nxsem_init(&priv->sem_isr, 0, 0);
   sem_setprotocol(&priv->sem_isr, SEM_PRIO_NONE);
 #endif
 }

arch/arm/src/efm32/efm32_spi.c

@@ -1605,7 +1605,7 @@ static int spi_portinitialize(struct efm32_spidev_s *priv)
 
   /* Initialize the SPI semaphore that enforces mutually exclusive access */
 
-  sem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->exclsem, 0, 1);
 
 #ifdef CONFIG_EFM32_SPI_DMA
   /* Allocate two DMA channels... one for the RX and one for the TX side of
@@ -1639,8 +1639,8 @@ static int spi_portinitialize(struct efm32_spidev_s *priv)
 
   /* Initialized semaphores used to wait for DMA completion */
 
-  (void)sem_init(&priv->rxdmasem, 0, 0);
-  (void)sem_init(&priv->txdmasem, 0, 0);
+  (void)nxsem_init(&priv->rxdmasem, 0, 0);
+  (void)nxsem_init(&priv->txdmasem, 0, 0);
 
   /* These semaphores are used for signaling and, hence, should not have
    * priority inheritance enabled.

arch/arm/src/efm32/efm32_usbhost.c

@@ -5155,8 +5155,8 @@ static inline void efm32_sw_initialize(FAR struct efm32_usbhost_s *priv)
 
   /* Initialize semaphores */
 
-  sem_init(&priv->pscsem,  0, 0);
-  sem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->pscsem,  0, 0);
+  nxsem_init(&priv->exclsem, 0, 1);
 
   /* The pscsem semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.
@@ -5186,7 +5186,7 @@ static inline void efm32_sw_initialize(FAR struct efm32_usbhost_s *priv)
        * have priority inheritance enabled.
        */
 
-      sem_init(&chan->waitsem,  0, 0);
+      nxsem_init(&chan->waitsem,  0, 0);
       sem_setprotocol(&chan->waitsem, SEM_PRIO_NONE);
     }
 }

arch/arm/src/imx1/imx_spi.c

@@ -1122,10 +1122,10 @@ FAR struct spi_dev_s *imx_spibus_initialize(int port)
    * signaling and, hence, should not have priority inheritance enabled.
    */
 
-   sem_init(&priv->waitsem, 0, 0);
+   nxsem_init(&priv->waitsem, 0, 0);
    sem_setprotocol(&priv->waitsem, SEM_PRIO_NONE);
 #endif
-   sem_init(&priv->exclsem, 0, 1);
+   nxsem_init(&priv->exclsem, 0, 1);
 
   /* Initialize control register: min frequency, ignore ready, master mode, mode=0, 8-bit */
 

arch/arm/src/imx6/imx_ecspi.c

@@ -1308,10 +1308,10 @@ FAR struct spi_dev_s *imx_spibus_initialize(int port)
    * signaling and, hence, should not have priority inheritance enabled.
    */
 
-   sem_init(&priv->waitsem, 0, 0);
+   nxsem_init(&priv->waitsem, 0, 0);
    sem_setprotocol(&priv->waitsem, SEM_PRIO_NONE);
 #endif
-   sem_init(&priv->exclsem, 0, 1);
+   nxsem_init(&priv->exclsem, 0, 1);
 
   /* Initialize control register: min frequency, ignore ready, master mode, mode=0, 8-bit */
 

arch/arm/src/kinetis/kinetis_i2c.c

@@ -316,13 +316,13 @@ static void kinetis_i2c_putreg(struct kinetis_i2cdev_s *priv, uint8_t value,
 
 static inline void kinetis_i2c_sem_init(FAR struct kinetis_i2cdev_s *priv)
 {
-  sem_init(&priv->mutex, 0, 1);
+  nxsem_init(&priv->mutex, 0, 1);
 
   /* This semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.
    */
 
-  sem_init(&priv->wait, 0, 0);
+  nxsem_init(&priv->wait, 0, 0);
   sem_setprotocol(&priv->wait, SEM_PRIO_NONE);
 }
 

arch/arm/src/kinetis/kinetis_sdhc.c

@@ -2807,7 +2807,7 @@ FAR struct sdio_dev_s *sdhc_initialize(int slotno)
   /* Initialize the SDHC slot structure data structure */
   /* Initialize semaphores */
 
-  sem_init(&priv->waitsem, 0, 0);
+  nxsem_init(&priv->waitsem, 0, 0);
 
   /* The waitsem semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.

arch/arm/src/kinetis/kinetis_spi.c

@@ -1234,7 +1234,7 @@ FAR struct spi_dev_s *kinetis_spibus_initialize(int port)
 
   /* Initialize the SPI semaphore that enforces mutually exclusive access */
 
-  sem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->exclsem, 0, 1);
 
   return &priv->spidev;
 }

arch/arm/src/kl/kl_spi.c

@@ -689,7 +689,7 @@ FAR struct spi_dev_s *kl_spibus_initialize(int port)
 
   /* Initialize the SPI semaphore that enforces mutually exclusive access */
 
-  sem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->exclsem, 0, 1);
   return &priv->spidev;
 }
 

arch/arm/src/lc823450/lc823450_adc.c

@@ -535,9 +535,9 @@ FAR struct adc_dev_s *lc823450_adcinitialize(void)
       inst->nchannels = CONFIG_ADC_NCHANNELS;
       inst->chanlist = lc823450_chanlist;
 
-      sem_init(&inst->sem_excl, 0, 1);
+      nxsem_init(&inst->sem_excl, 0, 1);
 #ifndef CONFIG_ADC_POLLED
-      sem_init(&inst->sem_isr, 0, 0);
+      nxsem_init(&inst->sem_isr, 0, 0);
 #endif
 
       lc823450_adc_sem_wait(inst);

arch/arm/src/lc823450/lc823450_dma.c

@@ -344,7 +344,7 @@ void up_dmainitialize(void)
       sq_init(&g_dma.phydmach[i].req_q);
     }
 
-  sem_init(&g_dma.exclsem, 0, 1);
+  nxsem_init(&g_dma.exclsem, 0, 1);
 
   if (irq_attach(LC823450_IRQ_DMAC, dma_interrupt, NULL) != 0)
     {

arch/arm/src/lc823450/lc823450_i2c.c

@@ -1114,9 +1114,9 @@ FAR struct i2c_master_s *lc823450_i2cbus_initialize(int port)
 
   if ((volatile int)priv->refs++ == 0)
     {
-      sem_init(&priv->sem_excl, 0, 1);
+      nxsem_init(&priv->sem_excl, 0, 1);
 #ifndef CONFIG_I2C_POLLED
-      sem_init(&priv->sem_isr, 0, 0);
+      nxsem_init(&priv->sem_isr, 0, 0);
 #endif
       (void)lc823450_i2c_init(priv, port);
     }

arch/arm/src/lc823450/lc823450_mtd.c

@@ -516,7 +516,7 @@ static FAR struct mtd_dev_s *lc823450_mtd_allocdev(uint32_t channel)
       return NULL;
     }
 
-  sem_init(&priv->sem, 0, 1);
+  nxsem_init(&priv->sem, 0, 1);
 
   priv->mtd.erase  = lc823450_erase;
   priv->mtd.bread  = lc823450_bread;

arch/arm/src/lc823450/lc823450_sdc.c

@@ -644,7 +644,7 @@ int lc823450_sdc_locked(void)
 
   for (i = 0; i < 2; i++)
     {
-      (void)sem_getvalue(&_sdc_sem[i], &val);
+      (void)nxsem_getvalue(&_sdc_sem[i], &val);
       if (1 != val)
         {
           ret = 1;

arch/arm/src/lc823450/lc823450_sddrv_dep.c

@@ -289,9 +289,9 @@ SINT_T sddep_os_init(struct SdDrCfg_s *cfg)
 
 #ifdef CONFIG_LC823450_SDC_DMA
   _hrdma[ch] = lc823450_dmachannel(DMA_CHANNEL_VIRTUAL);
-  sem_init(&_sem_rwait[ch], 0, 0);
+  nxsem_init(&_sem_rwait[ch], 0, 0);
   _hwdma[ch] = lc823450_dmachannel(DMA_CHANNEL_VIRTUAL);
-  sem_init(&_sem_wwait[ch], 0, 0);
+  nxsem_init(&_sem_wwait[ch], 0, 0);
 #endif /* CONFIG_LC823450_SDC_DMA */
   return 0;
 }

arch/arm/src/lc823450/lc823450_serial.c

@@ -1317,12 +1317,12 @@ void up_serialinit(void)
 #ifdef TTYS1_DEV
   (void)uart_register("/dev/ttyS1", &TTYS1_DEV);
 #ifdef CONFIG_HSUART
-  sem_init(&g_uart1priv.txdma_wait, 0, 1);
+  nxsem_init(&g_uart1priv.txdma_wait, 0, 1);
   g_uart1priv.htxdma = lc823450_dmachannel(DMA_CHANNEL_UART1TX);
   lc823450_dmarequest(g_uart1priv.htxdma, DMA_REQUEST_UART1TX);
 
 
-  sem_init(&g_uart1priv.rxdma_wait, 0, 0);
+  nxsem_init(&g_uart1priv.rxdma_wait, 0, 0);
   g_uart1priv.hrxdma = lc823450_dmachannel(DMA_CHANNEL_UART1RX);
   lc823450_dmarequest(g_uart1priv.hrxdma, DMA_REQUEST_UART1RX);
 

arch/arm/src/lc823450/lc823450_spi.c

@@ -537,7 +537,7 @@ FAR struct spi_dev_s *lc823450_spibus_initialize(int port)
       modifyreg32(MRSTCNTAPB, 0, MRSTCNTAPB_PORT5_RSTB);
 
 #ifndef CONFIG_SPI_OWNBUS
-      sem_init(&priv->exclsem, 0, 1);
+      nxsem_init(&priv->exclsem, 0, 1);
 #endif
 
       /* Initialize SPI mode. It must be done before starting SPI transfer */
@@ -556,7 +556,7 @@ FAR struct spi_dev_s *lc823450_spibus_initialize(int port)
       lc823450_spiinitialize();
 
 #ifdef CONFIG_LC823450_SPI_DMA
-      sem_init(&priv->dma_wait, 0, 0);
+      nxsem_init(&priv->dma_wait, 0, 0);
       priv->hdma = lc823450_dmachannel(DMA_CHANNEL_SIOTX);
       lc823450_dmarequest(priv->hdma, DMA_REQUEST_SIOTX);
 

arch/arm/src/lc823450/lc823450_timerisr.c

@@ -387,7 +387,7 @@ int up_hrttimer_usleep(unsigned int usec)
 {
   struct hrt_s hrt;
 
-  sem_init(&hrt.sem, 0, 0);
+  nxsem_init(&hrt.sem, 0, 0);
   hrt.usec = usec;
 
   hrt_usleep_add(&hrt);

arch/arm/src/lc823450/lc823450_usbdev.c

@@ -1430,7 +1430,7 @@ void up_usbinitialize(void)
       return;
     }
 
-  sem_init(&dma_wait, 0, 0);
+  nxsem_init(&dma_wait, 0, 0);
   hdma = lc823450_dmachannel(DMA_CHANNEL_USBDEV);
   lc823450_dmarequest(hdma, DMA_REQUEST_USBDEV);
 
@@ -1697,7 +1697,7 @@ void usbdev_msc_read_enter()
   privep->epcmd &= ~USB_EPCMD_EMPTY_EN;
   epcmd_write(CONFIG_USBMSC_EPBULKIN, (privep->epcmd));
   lc823450_dmareauest_dir(hdma, DMA_REQUEST_USBDEV, 1);
-  sem_init(&dma_wait, 0, 0);
+  nxsem_init(&dma_wait, 0, 0);
 }
 
 /****************************************************************************
@@ -1800,7 +1800,7 @@ void usbdev_msc_write_enter0(void)
   privep->epcmd &= ~USB_EPCMD_READY_EN;
   epcmd_write(CONFIG_USBMSC_EPBULKOUT, (privep->epcmd));
   lc823450_dmareauest_dir(hdma, DMA_REQUEST_USBDEV, 0);
-  sem_init(&dma_wait, 0, 0);
+  nxsem_init(&dma_wait, 0, 0);
 }
 
 /****************************************************************************

arch/arm/src/lpc11xx/lpc11_i2c.c

@@ -564,8 +564,8 @@ struct i2c_master_s *lpc11_i2cbus_initialize(int port)
 
   /* Initialize semaphores */
 
-  sem_init(&priv->mutex, 0, 1);
-  sem_init(&priv->wait, 0, 0);
+  nxsem_init(&priv->mutex, 0, 1);
+  nxsem_init(&priv->wait, 0, 0);
 
   /* The wait semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.

arch/arm/src/lpc11xx/lpc11_spi.c

@@ -579,7 +579,7 @@ FAR struct spi_dev_s *lpc11_spibus_initialize(int port)
 
   /* Initialize the SPI semaphore that enforces mutually exclusive access */
 
-  sem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->exclsem, 0, 1);
   return &priv->spidev;
 }
 

arch/arm/src/lpc11xx/lpc11_ssp.c

@@ -993,7 +993,7 @@ FAR struct spi_dev_s *lpc11_sspbus_initialize(int port)
 
   /* Initialize the SPI semaphore that enforces mutually exclusive access */
 
-  sem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->exclsem, 0, 1);
 
   /* Enable the SPI */
 

arch/arm/src/lpc17xx/lpc17_gpdma.c

@@ -305,7 +305,7 @@ void weak_function up_dmainitialize(void)
 
   /* Initialize the DMA state structure */
 
-  sem_init(&g_gpdma.exclsem, 0, 1);
+  nxsem_init(&g_gpdma.exclsem, 0, 1);
 
   for (i = 0; i < LPC17_NDMACH; i++)
     {

arch/arm/src/lpc17xx/lpc17_i2c.c

@@ -569,8 +569,8 @@ struct i2c_master_s *lpc17_i2cbus_initialize(int port)
 
   /* Initialize semaphores */
 
-  sem_init(&priv->mutex, 0, 1);
-  sem_init(&priv->wait, 0, 0);
+  nxsem_init(&priv->mutex, 0, 1);
+  nxsem_init(&priv->wait, 0, 0);
 
   /* The wait semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.

arch/arm/src/lpc17xx/lpc17_sdcard.c

@@ -2718,7 +2718,7 @@ FAR struct sdio_dev_s *sdio_initialize(int slotno)
   /* Initialize the SD card slot structure */
   /* Initialize semaphores */
 
-  sem_init(&priv->waitsem, 0, 0);
+  nxsem_init(&priv->waitsem, 0, 0);
 
   /* The waitsem semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.

arch/arm/src/lpc17xx/lpc17_spi.c

@@ -570,7 +570,7 @@ FAR struct spi_dev_s *lpc17_spibus_initialize(int port)
 
   /* Initialize the SPI semaphore that enforces mutually exclusive access */
 
-  sem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->exclsem, 0, 1);
   return &priv->spidev;
 }
 

arch/arm/src/lpc17xx/lpc17_ssp.c

@@ -982,7 +982,7 @@ FAR struct spi_dev_s *lpc17_sspbus_initialize(int port)
 
   /* Initialize the SPI semaphore that enforces mutually exclusive access */
 
-  sem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->exclsem, 0, 1);
 
   /* Enable the SPI */
 

arch/arm/src/lpc17xx/lpc17_usbhost.c

@@ -2267,7 +2267,7 @@ static int lpc17_epalloc(struct usbhost_driver_s *drvr,
        * should not have priority inheritance enabled.
        */
 
-      sem_init(&ed->wdhsem, 0, 0);
+      nxsem_init(&ed->wdhsem, 0, 0);
       sem_setprotocol(&ed->wdhsem, SEM_PRIO_NONE);
 
       /* Link the common tail TD to the ED's TD list */
@@ -3641,8 +3641,8 @@ struct usbhost_connection_s *lpc17_usbhost_initialize(int controller)
 
   /* Initialize semaphores */
 
-  sem_init(&priv->pscsem,  0, 0);
-  sem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->pscsem,  0, 0);
+  nxsem_init(&priv->exclsem, 0, 1);
 
   /* The pscsem semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.
@@ -3735,7 +3735,7 @@ struct usbhost_connection_s *lpc17_usbhost_initialize(int controller)
    * not have priority inheritance enabled.
    */
 
-  sem_init(&EDCTRL->wdhsem, 0, 0);
+  nxsem_init(&EDCTRL->wdhsem, 0, 0);
   sem_setprotocol(&EDCTRL->wdhsem, SEM_PRIO_NONE);
 
   /* Initialize user-configurable EDs */

arch/arm/src/lpc2378/lpc23xx_i2c.c

@@ -580,8 +580,8 @@ struct i2c_master_s *lpc2378_i2cbus_initialize(int port)
 
   /* Initialize semaphores */
 
-  sem_init(&priv->mutex, 0, 1);
-  sem_init(&priv->wait, 0, 0);
+  nxsem_init(&priv->mutex, 0, 1);
+  nxsem_init(&priv->wait, 0, 0);
 
   /* The wait semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.

arch/arm/src/lpc2378/lpc23xx_spi.c

@@ -582,7 +582,7 @@ FAR struct spi_dev_s *lpc23_spibus_initialize(int port)
 
   /* Initialize the SPI semaphore that enforces mutually exclusive access */
 
-  sem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->exclsem, 0, 1);
   return &priv->spidev;
 }
 

arch/arm/src/lpc31xx/lpc31_ehci.c

@@ -3937,7 +3937,7 @@ static int lpc31_epalloc(FAR struct usbhost_driver_s *drvr,
    * priority inheritance enabled.
    */
 
-  sem_init(&epinfo->iocsem, 0, 0);
+  nxsem_init(&epinfo->iocsem, 0, 0);
   sem_setprotocol(&epinfo->iocsem, SEM_PRIO_NONE);
 
   /* Success.. return an opaque reference to the endpoint information structure
@@ -4920,8 +4920,8 @@ FAR struct usbhost_connection_s *lpc31_ehci_initialize(int controller)
 
   /* Initialize the EHCI state data structure */
 
-  sem_init(&g_ehci.exclsem, 0, 1);
-  sem_init(&g_ehci.pscsem,  0, 0);
+  nxsem_init(&g_ehci.exclsem, 0, 1);
+  nxsem_init(&g_ehci.pscsem,  0, 0);
 
   /* The pscsem semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.
@@ -4931,7 +4931,7 @@ FAR struct usbhost_connection_s *lpc31_ehci_initialize(int controller)
 
   /* Initialize EP0 */
 
-  sem_init(&g_ehci.ep0.iocsem, 0, 1);
+  nxsem_init(&g_ehci.ep0.iocsem, 0, 1);
 
   /* Initialize the root hub port structures */
 
@@ -4970,7 +4970,7 @@ FAR struct usbhost_connection_s *lpc31_ehci_initialize(int controller)
        * should not have priority inheritance enabled.
        */
 
-      sem_init(&rhport->ep0.iocsem, 0, 0);
+      nxsem_init(&rhport->ep0.iocsem, 0, 0);
       sem_setprotocol(&rhport->iocsem, SEM_PRIO_NONE);
 
       /* Initialize the public port representation */

arch/arm/src/lpc31xx/lpc31_i2c.c

@@ -551,8 +551,8 @@ struct i2c_master_s *lpc31_i2cbus_initialize(int port)
 
   /* Initialize semaphores */
 
-  sem_init(&priv->mutex, 0, 1);
-  sem_init(&priv->wait, 0, 0);
+  nxsem_init(&priv->mutex, 0, 1);
+  nxsem_init(&priv->wait, 0, 0);
 
   /* The wait semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.

arch/arm/src/lpc31xx/lpc31_spi.c

@@ -941,7 +941,7 @@ FAR struct spi_dev_s *lpc31_spibus_initialize(int port)
 
   /* Initialize the SPI semaphore that enforces mutually exclusive access */
 
-  sem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->exclsem, 0, 1);
 
   /* Reset the SPI block */
 

arch/arm/src/lpc43xx/lpc43_ehci.c

@@ -3774,7 +3774,7 @@ static int lpc43_epalloc(FAR struct usbhost_driver_s *drvr,
    * should not have priority inheritance enabled.
    */
 
-  sem_init(&epinfo->iocsem, 0, 0);
+  nxsem_init(&epinfo->iocsem, 0, 0);
   sem_setprotocol(&epinfo->iocsem, SEM_PRIO_NONE);
 
   /* Success.. return an opaque reference to the endpoint information structure
@@ -4751,8 +4751,8 @@ FAR struct usbhost_connection_s *lpc43_ehci_initialize(int controller)
 
   /* Initialize the EHCI state data structure */
 
-  sem_init(&g_ehci.exclsem, 0, 1);
-  sem_init(&g_ehci.pscsem,  0, 0);
+  nxsem_init(&g_ehci.exclsem, 0, 1);
+  nxsem_init(&g_ehci.pscsem,  0, 0);
 
   /* The pscsem semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.
@@ -4762,7 +4762,7 @@ FAR struct usbhost_connection_s *lpc43_ehci_initialize(int controller)
 
   /* Initialize EP0 */
 
-  sem_init(&g_ehci.ep0.iocsem, 0, 1);
+  nxsem_init(&g_ehci.ep0.iocsem, 0, 1);
 
   /* Initialize the root hub port structures */
 
@@ -4801,7 +4801,7 @@ FAR struct usbhost_connection_s *lpc43_ehci_initialize(int controller)
        * not have priority inheritance enabled.
        */
 
-      sem_init(&rhport->ep0.iocsem, 0, 0);
+      nxsem_init(&rhport->ep0.iocsem, 0, 0);
       sem_setprotocol(&rhport->ep0.iocsem, SEM_PRIO_NONE);
 
       /* Initialize the public port representation */

arch/arm/src/lpc43xx/lpc43_gpdma.c

@@ -305,7 +305,7 @@ void weak_function up_dmainitialize(void)
 
   /* Initialize the DMA state structure */
 
-  sem_init(&g_gpdma.exclsem, 0, 1);
+  nxsem_init(&g_gpdma.exclsem, 0, 1);
 
   for (i = 0; i < LPC43_NDMACH; i++)
     {

arch/arm/src/lpc43xx/lpc43_i2c.c

@@ -526,8 +526,8 @@ struct i2c_master_s *lpc43_i2cbus_initialize(int port)
 
   /* Initialize semaphores */
 
-  sem_init(&priv->mutex, 0, 1);
-  sem_init(&priv->wait, 0, 0);
+  nxsem_init(&priv->mutex, 0, 1);
+  nxsem_init(&priv->wait, 0, 0);
 
   /* The wait semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.

arch/arm/src/lpc43xx/lpc43_spi.c

@@ -540,7 +540,7 @@ static FAR struct spi_dev_s *lpc43_spiport_initialize(int port)
 
   /* Initialize the SPI semaphore that enforces mutually exclusive access */
 
-  sem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->exclsem, 0, 1);
   return &priv->spidev;
 }
 #endif /* CONFIG_LPC43_SPI */

arch/arm/src/lpc43xx/lpc43_ssp.c

@@ -827,7 +827,7 @@ FAR struct spi_dev_s *lpc43_sspbus_initialize(int port)
 
   /* Initialize the SPI semaphore that enforces mutually exclusive access */
 
-  sem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->exclsem, 0, 1);
 
   /* Enable the SPI */
 

arch/arm/src/sam34/sam4cm_tc.c

@@ -748,7 +748,7 @@ static inline struct sam_chan_s *sam_tc_initialize(int channel)
       tmrerr("ERROR: Initializing TC%d\n", chconfig->chan);
 
       memset(chan, 0, sizeof(struct sam_chan_s));
-      sem_init(&chan->exclsem, 0, 1);
+      nxsem_init(&chan->exclsem, 0, 1);
       chan->base = chconfig->base;
       chan->pid  = chconfig->pid;
       chan->irq  = chconfig->irq;

arch/arm/src/sam34/sam_aes.c

@@ -225,7 +225,7 @@ int aes_cypher(void *out, const void *in, uint32_t size, const void *iv,
 
 int up_aesinitialize()
 {
-  sem_init(&lock, 0, 1);
+  nxsem_init(&lock, 0, 1);
   sam_aes_enableclk();
   putreg32(AES_CR_SWRST, SAM_AES_CR);
   return OK;

arch/arm/src/sam34/sam_dmac.c

@@ -1382,8 +1382,8 @@ void weak_function up_dmainitialize(void)
 
   /* Initialize semaphores */
 
-  sem_init(&g_chsem, 0, 1);
-  sem_init(&g_dsem, 0, CONFIG_SAM34_NLLDESC);
+  nxsem_init(&g_chsem, 0, 1);
+  nxsem_init(&g_dsem, 0, CONFIG_SAM34_NLLDESC);
 }
 
 /****************************************************************************

arch/arm/src/sam34/sam_hsmci.c

@@ -2681,7 +2681,7 @@ FAR struct sdio_dev_s *sdio_initialize(int slotno)
   /* Initialize the HSMCI slot structure */
   /* Initialize semaphores */
 
-  sem_init(&priv->waitsem, 0, 0);
+  nxsem_init(&priv->waitsem, 0, 0);
 
   /* The waitsem semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.

arch/arm/src/sam34/sam_spi.c

@@ -1878,7 +1878,7 @@ struct spi_dev_s *sam_spibus_initialize(int port)
        * access to the SPI registers.
        */
 
-      sem_init(&spi->spisem, 0, 1);
+      nxsem_init(&spi->spisem, 0, 1);
       spi->initialized = true;
 
 #ifdef CONFIG_SAM34_SPI_DMA
@@ -1887,7 +1887,7 @@ struct spi_dev_s *sam_spibus_initialize(int port)
        * signaling and, hence, should not have priority inheritance enabled.
        */
 
-      sem_init(&spics->dmawait, 0, 0);
+      nxsem_init(&spics->dmawait, 0, 0);
       sem_setprotocol(&spics->dmawait, SEM_PRIO_NONE);
 
       /* Create a watchdog time to catch DMA timeouts */

arch/arm/src/sam34/sam_twi.c

@@ -967,8 +967,8 @@ struct i2c_master_s *sam_i2cbus_initialize(int bus)
 
   /* Initialize semaphores */
 
-  sem_init(&priv->exclsem, 0, 1);
-  sem_init(&priv->waitsem, 0, 0);
+  nxsem_init(&priv->exclsem, 0, 1);
+  nxsem_init(&priv->waitsem, 0, 0);
 
   /* The waitsem semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.

arch/arm/src/sama5/sam_adc.c

@@ -2025,7 +2025,7 @@ struct adc_dev_s *sam_adc_initialize(void)
 
       /* Initialize the private ADC device data structure */
 
-      sem_init(&priv->exclsem,  0, 1);
+      nxsem_init(&priv->exclsem,  0, 1);
       priv->cb  = NULL;
       priv->dev = &g_adcdev;
 

arch/arm/src/sama5/sam_can.c

@@ -1947,7 +1947,7 @@ FAR struct can_dev_s *sam_caninitialize(int port)
       priv->freemb      = CAN_ALL_MAILBOXES;
       priv->initialized = true;
 
-      sem_init(&priv->exclsem, 0, 1);
+      nxsem_init(&priv->exclsem, 0, 1);
 
       dev->cd_ops       = &g_canops;
       dev->cd_priv      = (FAR void *)priv;

arch/arm/src/sama5/sam_dmac.c

@@ -1879,8 +1879,8 @@ void sam_dmainitialize(struct sam_dmac_s *dmac)
 
   /* Initialize semaphores */
 
-  sem_init(&dmac->chsem, 0, 1);
-  sem_init(&dmac->dsem, 0, SAM_NDMACHAN);
+  nxsem_init(&dmac->chsem, 0, 1);
+  nxsem_init(&dmac->dsem, 0, SAM_NDMACHAN);
 }
 
 /****************************************************************************

arch/arm/src/sama5/sam_ehci.c

@@ -3758,7 +3758,7 @@ static int sam_epalloc(FAR struct usbhost_driver_s *drvr,
    * should not have priority inheritance enabled.
    */
 
-  sem_init(&epinfo->iocsem, 0, 0);
+  nxsem_init(&epinfo->iocsem, 0, 0);
   sem_setprotocol(&epinfo->iocsem, SEM_PRIO_NONE);
 
   /* Success.. return an opaque reference to the endpoint information structure
@@ -4791,8 +4791,8 @@ FAR struct usbhost_connection_s *sam_ehci_initialize(int controller)
 
   /* Initialize the EHCI state data structure */
 
-  sem_init(&g_ehci.exclsem, 0, 1);
-  sem_init(&g_ehci.pscsem,  0, 0);
+  nxsem_init(&g_ehci.exclsem, 0, 1);
+  nxsem_init(&g_ehci.pscsem,  0, 0);
 
   /* The pscsem semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.
@@ -4802,7 +4802,7 @@ FAR struct usbhost_connection_s *sam_ehci_initialize(int controller)
 
   /* Initialize EP0 */
 
-  sem_init(&g_ehci.ep0.iocsem, 0, 1);
+  nxsem_init(&g_ehci.ep0.iocsem, 0, 1);
 
   /* Initialize the root hub port structures */
 
@@ -4841,7 +4841,7 @@ FAR struct usbhost_connection_s *sam_ehci_initialize(int controller)
        * should not have priority inheritance enabled.
        */
 
-      sem_init(&rhport->ep0.iocsem, 0, 0);
+      nxsem_init(&rhport->ep0.iocsem, 0, 0);
       sem_setprotocol(&rhport->ep0.iocsem, SEM_PRIO_NONE);
 
       /* Initialize the public port representation */

arch/arm/src/sama5/sam_hsmci.c

@@ -3298,7 +3298,7 @@ FAR struct sdio_dev_s *sdio_initialize(int slotno)
   /* Initialize the HSMCI slot structure */
   /* Initialize semaphores */
 
-  sem_init(&priv->waitsem, 0, 0);
+  nxsem_init(&priv->waitsem, 0, 0);
 
   /* The waitsem semaphore is used for signaling and, hence, should not have
    * priority inheritance enabled.