nuttx/drivers: Replace irqsave() with enter_critical_section(); replace irqrestore() with leave_critical_section()

drivers/input/ads7843e.c

@@ -1,7 +1,7 @@
 /****************************************************************************
  * drivers/input/ads7843e.c
  *
- *   Copyright (C) 2011-2012, 2014 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2011-2012, 2014, 2016 Gregory Nutt. All rights reserved.
  *   Authors: Gregory Nutt <gnutt@nuttx.org>
  *            Diego Sanchez <dsanchez@nx-engineering.com>
  *
@@ -63,6 +63,7 @@
 #include <assert.h>
 #include <debug.h>
 
+#include <nuttx/irq.h>
 #include <nuttx/arch.h>
 #include <nuttx/wdog.h>
 #include <nuttx/kmalloc.h>
@@ -340,7 +341,7 @@ static int ads7843e_sample(FAR struct ads7843e_dev_s *priv,
    * from changing until it has been reported.
    */
 
-  flags = irqsave();
+  flags = enter_critical_section();
 
   /* Is there new ADS7843E sample data available? */
 
@@ -375,7 +376,7 @@ static int ads7843e_sample(FAR struct ads7843e_dev_s *priv,
       ret = OK;
     }
 
-  irqrestore(flags);
+  leave_critical_section(flags);
   return ret;
 }
 
@@ -398,7 +399,7 @@ static int ads7843e_waitsample(FAR struct ads7843e_dev_s *priv,
    */
 
   sched_lock();
-  flags = irqsave();
+  flags = enter_critical_section();
 
   /* Now release the semaphore that manages mutually exclusive access to
    * the device structure.  This may cause other tasks to become ready to
@@ -448,7 +449,7 @@ errout:
    * have pre-emption disabled.
    */
 
-  irqrestore(flags);
+  leave_critical_section(flags);
 
   /* Restore pre-emption.  We might get suspended here but that is okay
    * because we already have our sample.  Note:  this means that if there
@@ -1235,7 +1236,7 @@ int ads7843e_register(FAR struct spi_dev_s *spi,
 #ifdef CONFIG_ADS7843E_MULTIPLE
   priv->flink    = g_ads7843elist;
   g_ads7843elist = priv;
-  irqrestore(flags);
+  leave_critical_section(flags);
 #endif
 
   /* Schedule work to perform the initial sampling and to set the data