Filesystem: Use transient event

cpukit/libcsupport/include/rtems/libio.h

@@ -1462,8 +1462,9 @@ struct rtems_filesystem_mount_table_entry_tt {
 
   /**
    * The task that initiated the unmount process.  After unmount process
-   * completion this task will be notified via the
-   * @ref RTEMS_FILESYSTEM_UNMOUNT_EVENT.
+   * completion this task will be notified via the transient event.
+   *
+   * @see ClassicEventTransient.
    */
   rtems_id                               unmount_task;
 };
@@ -1526,15 +1527,16 @@ int rtems_filesystem_unregister(
  * unmounted file system the function returns with an error status and errno is
  * set to EBUSY.
  *
- * The unmount process completion notification uses the RTEMS classic API
- * event @ref RTEMS_FILESYSTEM_UNMOUNT_EVENT.  It is a fatal error to terminate
- * the calling thread while waiting for this event.
+ * The unmount process completion notification uses the transient event.  It is
+ * a fatal error to terminate the calling thread while waiting for this event.
  *
  * A concurrent unmount request for the same file system instance has
  * unpredictable effects.
  *
  * @retval 0 Successful operation.
  * @retval -1 An error occured.  The @c errno indicates the error.
+ *
+ * @see ClassicEventTransient.
  */
 int unmount(
   const char *mount_path

cpukit/libcsupport/include/rtems/libio_.h

@@ -38,16 +38,6 @@ extern "C" {
 #define RTEMS_LIBIO_SEM         rtems_build_name('L', 'B', 'I', 'O')
 #define RTEMS_LIBIO_IOP_SEM(n)  rtems_build_name('L', 'B', 'I', n)
 
-/**
- * @brief Event to signal an unmount process completion.
- *
- * This event should equal the RTEMS_BDBUF_TRANSFER_SYNC event to avoid too
- * many events reserved for the file system.
- *
- * @see rtems_filesystem_do_unmount() and unmount().
- */
-#define RTEMS_FILESYSTEM_UNMOUNT_EVENT RTEMS_EVENT_1
-
 extern rtems_id                          rtems_libio_semaphore;
 
 /*

cpukit/libcsupport/src/sup_fs_location.c

@@ -216,7 +216,7 @@ void rtems_filesystem_do_unmount(
 
   if (mt_entry->unmount_task != 0) {
     rtems_status_code sc =
-      rtems_event_send(mt_entry->unmount_task, RTEMS_FILESYSTEM_UNMOUNT_EVENT);
+      rtems_event_transient_send(mt_entry->unmount_task);
     if (sc != RTEMS_SUCCESSFUL) {
       rtems_fatal_error_occurred(0xdeadbeef);
     }

cpukit/libcsupport/src/unmount.c

@@ -70,12 +70,9 @@ int unmount( const char *path )
   rtems_filesystem_eval_path_cleanup( &ctx );
 
   if ( rv == 0 ) {
-    rtems_event_set out;
-    rtems_status_code sc = rtems_event_receive(
-      RTEMS_FILESYSTEM_UNMOUNT_EVENT,
-      RTEMS_EVENT_ALL | RTEMS_WAIT,
-      RTEMS_NO_TIMEOUT,
-      &out
+    rtems_status_code sc = rtems_event_transient_receive(
+      RTEMS_WAIT,
+      RTEMS_NO_TIMEOUT
     );
 
     if ( sc != RTEMS_SUCCESSFUL ) {