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, 24 deletions

diff --git a/bsps/arm/beagle/clock/clock.c b/bsps/arm/beagle/clock/clock.c
index d8b2062e80..d42b051c98 100644
--- a/bsps/arm/beagle/clock/clock.c
+++ b/bsps/arm/beagle/clock/clock.c
@@ -290,34 +290,10 @@ static void beagle_clock_handler_install(rtems_interrupt_handler isr)
   clock_isr = isr;
 }
 
-static void beagle_clock_cleanup(void)
-{
-  rtems_status_code sc = RTEMS_SUCCESSFUL;
-
-  /* Disable timer */
-  mmio_clear(timer->base + timer->regs->TCLR, OMAP3_TCLR_ST);
-
-  /* Remove interrupt handler */
-  sc = rtems_interrupt_handler_remove(
-    timer->irq_nr,
-    clock_isr,
-    NULL
-  );
-  if (sc != RTEMS_SUCCESSFUL) {
-    rtems_fatal_error_occurred(0xdeadbeef);
-  }
-  clock_isr = NULL;
-
-  /* stop frclock */
-  mmio_clear(fr_timer->base + fr_timer->regs->TCLR, OMAP3_TCLR_ST);
-}
-
 #define Clock_driver_support_at_tick() beagle_clock_at_tick()
 #define Clock_driver_support_initialize_hardware() beagle_clock_initialize()
 #define Clock_driver_support_install_isr(isr) \
   beagle_clock_handler_install(isr)
 
-#define Clock_driver_support_shutdown_hardware() beagle_clock_cleanup()
-
 /* Include shared source clock driver code */
 #include "../../shared/dev/clock/clockimpl.h"