Remove Clock_driver_support_shutdown_hardware()

The aim of this clock driver hook was to stop clock tick interrupts at
some late point in the exit() procedure.

The use of atexit() pulls in malloc() which pulls in errno. It is
incompatible with the intention of the
CONFIGURE_DISABLE_NEWLIB_REENTRANCY configuration option.

The exit() function must be called from thread context, so accompanied
clock tick interrupts should cause no harm.  On the contrary, someone
may assume a normal operating system operation, e.g. working timeouts.

Remove the Clock_driver_support_shutdown_hardware() clock driver hook.

Close #3436.

1 files changed, 0 insertions, 13 deletions

diff --git a/bsps/arm/rtl22xx/clock/clockdrv.c b/bsps/arm/rtl22xx/clock/clockdrv.c
index 84ab9c063b..0e8fa274a7 100644
--- a/bsps/arm/rtl22xx/clock/clockdrv.c
+++ b/bsps/arm/rtl22xx/clock/clockdrv.c
@@ -127,19 +127,6 @@ rtems_irq_connect_data clock_isr_data = {
   } while (0)
 
 /**
- * Do whatever you need to shut the clock down and remove the
- * interrupt handler. Since this normally only gets called on
- * RTEMS shutdown, you may not need to do anything other than
- * remove the ISR.
- */
-#define Clock_driver_support_shutdown_hardware()                        \
-  do {                                                                  \
-    /* Disable timer */ \
-    T0TCR&=~0x02; \
-    BSP_remove_rtems_irq_handler(&clock_isr_data);                  \
-  } while (0)
-
-/**
  * Enables clock interrupt.
  *
  * If the interrupt is always on, this can be a NOP.