---
c-user/interrupt_manager.rst | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/c-user/interrupt_manager.rst b/c-user/interrupt_manager.rst
index 11293f6..dba9cfb 100644
--- a/c-user/interrupt_manager.rst
+++ b/c-user/interrupt_manager.rst
@@ -404,18 +404,22 @@ DIRECTIVE STATUS CODES:
NONE
DESCRIPTION:
- This directive temporarily enables maskable interrupts to the ``level``
- which was returned by a previous call to ``rtems_interrupt_disable``.
- Immediately prior to invoking this directive, maskable interrupts should be
- disabled by a call to ``rtems_interrupt_disable`` and will be redisabled
- when this directive returns to the caller.
+ This directive is functionally equivalent to a
+ ``rtems_interrupt_enable( level )`` immediately followed by a
+ ``rtems_interrupt_disable( level )``. On some
+ architectures it is possible to provide an optimized implementation for
+ this sequence.
NOTES:
This directive will not cause the calling task to be preempted.
- This directive is only available on uni-processor configurations. The
+ This directive is only available in uni-processor configurations. The
directives ``rtems_interrupt_local_disable`` and
- ``rtems_interrupt_local_enable`` is available on all configurations.
+ ``rtems_interrupt_local_enable`` is available in all configurations.
+
+ Historically, the interrupt flash function was heavily used in the
+ operating system implementation. However, this is no longer the case. The
+ interrupt flash function is provided for backward compatibility reasons.
.. raw:: latex
--
2.12.3
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