arch: Rename _exit to up_exit to follow the naming convention

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Change-Id: I2779a2a3ccb5426fe78714fdcc629b8dfbb7aaf6

Documentation/NuttxPortingGuide.html

@@ -78,7 +78,7 @@
       <a href="#upblocktask">4.2.9 <code>up_block_task()</code></a><br>
       <a href="#upreleasepending">4.2.10 <code>up_release_pending()</code></a><br>
       <a href="#upreprioritizertr">4.2.11 <code>up_reprioritize_rtr()</code></a><br>
-      <a href="#_exit">4.2.12 <code>_exit()</code></a><br>
+      <a href="#upexit">4.2.12 <code>up_exit()</code></a><br>
       <a href="#upassert">4.2.13 <code>up_assert()</code></a><br>
       <a href="#upschedulesigaction">4.2.14 <code>up_schedule_sigaction()</code></a><br>
       <a href="#upallocateheap">4.2.15 <code>up_allocate_heap()</code></a><br>
@@ -2131,8 +2131,8 @@ The specific environmental definitions are unique for each board but should incl
   </li>
 </ul>
 
-<h3><a name="_exit">4.2.12 <code>_exit()</code></a></h3>
+<h3><a name="up_exit">4.2.12 <code>up_exit()</code></a></h3>
-<p><b>Function Prototype</b>: <code>void _exit(int status) noreturn_function;</code></p>
+<p><b>Function Prototype</b>: <code>void up_exit(int status) noreturn_function;</code></p>
 
 <p><b>Description</b>.
   This function causes the currently executing task to cease

arch/arm/src/common/arm_exit.c

@@ -114,7 +114,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -124,7 +124,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   struct tcb_s *tcb = this_task();
 

arch/avr/src/common/up_exit.c

@@ -129,7 +129,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -139,7 +139,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   struct tcb_s *tcb = this_task();
 

arch/hc/src/common/up_exit.c

@@ -113,7 +113,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -123,7 +123,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   struct tcb_s *tcb = this_task();
 

arch/mips/src/common/mips_exit.c

@@ -131,7 +131,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -141,7 +141,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   struct tcb_s *tcb = this_task();
 

arch/misoc/src/lm32/lm32_exit.c

@@ -124,7 +124,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -134,7 +134,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   struct tcb_s *tcb = this_task();
 

arch/misoc/src/minerva/minerva_exit.c

@@ -122,7 +122,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -132,7 +132,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   struct tcb_s *tcb = this_task();
 

arch/or1k/src/common/up_exit.c

@@ -129,7 +129,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -139,7 +139,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   struct tcb_s *tcb = this_task();
 

arch/renesas/src/common/up_exit.c

@@ -113,7 +113,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -123,7 +123,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   struct tcb_s *tcb = this_task();
 

arch/risc-v/src/common/riscv_exit.c

@@ -131,7 +131,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -141,7 +141,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   struct tcb_s *tcb = this_task();
 

arch/sim/src/sim/up_exit.c

@@ -53,7 +53,7 @@
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -63,7 +63,7 @@
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   FAR struct tcb_s *tcb = this_task();
 

arch/x86/src/common/up_exit.c

@@ -113,7 +113,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease to exist.
@@ -123,7 +123,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   struct tcb_s *tcb = this_task();
 

arch/x86_64/src/common/up_exit.c

@@ -117,7 +117,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease to exist.
@@ -127,7 +127,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   struct tcb_s *tcb;
 

arch/xtensa/src/common/xtensa_exit.c

@@ -130,7 +130,7 @@ static void _xtensa_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -140,7 +140,7 @@ static void _xtensa_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   struct tcb_s *tcb = this_task();
 

arch/z16/src/common/z16_exit.c

@@ -113,7 +113,7 @@ static void _z16_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -123,7 +123,7 @@ static void _z16_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   FAR struct tcb_s *tcb = this_task();
 

arch/z80/src/common/z80_exit.c

@@ -115,7 +115,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -125,7 +125,7 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
  *
  ****************************************************************************/
 
-void _exit(int status)
+void up_exit(int status)
 {
   FAR struct tcb_s *tcb = this_task();
 

include/nuttx/arch.h

@@ -450,7 +450,7 @@ void up_release_pending(void);
 void up_reprioritize_rtr(FAR struct tcb_s *tcb, uint8_t priority);
 
 /****************************************************************************
- * Name: _exit
+ * Name: up_exit
  *
  * Description:
  *   This function causes the currently executing task to cease
@@ -464,6 +464,8 @@ void up_reprioritize_rtr(FAR struct tcb_s *tcb, uint8_t priority);
  *
  ****************************************************************************/
 
+void up_exit() noreturn_function;
+
 /* Prototype is in unistd.h */
 
 /****************************************************************************

sched/task/exit.c

@@ -39,6 +39,22 @@
  * Public Functions
  ****************************************************************************/
 
+/****************************************************************************
+ * Name: _exit
+ *
+ * Description:
+ *   This function causes the currently executing task to cease
+ *   to exist.  This is a special case of task_delete() where the task to
+ *   be deleted is the currently executing task.  It is more complex because
+ *   a context switch must be perform to the next ready to run task.
+ *
+ ****************************************************************************/
+
+void _exit(int status)
+{
+  up_exit(status);
+}
+
 /****************************************************************************
  * Name: exit
  *