[RTEMS Project] #3436: Remove clock driver Clock_driver_support_shutdown_hardware() hook

[RTEMS trac]

#3436: Remove clock driver Clock_driver_support_shutdown_hardware() hook
-----------------------------+------------------------------
 Reporter:  Sebastian Huber  |       Owner:  Sebastian Huber
     Type:  enhancement      |      Status:  closed
 Priority:  normal           |   Milestone:  5.1
Component:  dev              |     Version:  5
 Severity:  normal           |  Resolution:  fixed
 Keywords:                   |  Blocked By:
 Blocking:                   |
-----------------------------+------------------------------
Changes (by Sebastian Huber <sebastian.huber@…>):

 * status:  assigned => closed
 * resolution:   => fixed


Comment:

 In [changeset:"7ee59313932398aa2781503d25154c56301b9b73/rtems"
 7ee59313/rtems]:
 {{{
 #!CommitTicketReference repository="rtems"
 revision="7ee59313932398aa2781503d25154c56301b9b73"
 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.
 }}}

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Ticket URL: <http://devel.rtems.org/ticket/3436#comment:2>
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