c_user: Re-add task notepads for 4.11. Remove this patch after branching.

1 files changed, 32 insertions, 0 deletions

diff --git a/c_user/configuring_a_system.rst b/c_user/configuring_a_system.rst
index 9c36b2d..e993877 100644
--- a/c_user/configuring_a_system.rst
+++ b/c_user/configuring_a_system.rst
@@ -565,6 +565,38 @@ assumption that all tasks have floating point enabled. This would require the
 addition of a new configuration parameter to specify the number of tasks which
 enable floating point support.
 
+.. COMMENT: === CONFIGURE_ENABLE_CLASSIC_API_NOTEPADS ===
+
+.. _Specify Maximum Classic API Timers:
+
+Specify Maximum Classic API Timers
+----------------------------------
+.. index:: CONFIGURE_ENABLE_CLASSIC_API_NOTEPADS
+
+*CONSTANT:*
+    ``CONFIGURE_ENABLE_CLASSIC_API_NOTEPADS``
+
+*DATA TYPE:*
+    Boolean feature macro.
+
+*RANGE:*
+    Defined or undefined.
+
+*DEFAULT VALUE:*
+    This is not defined by default, and Classic API Notepads are not supported.
+
+**DESCRIPTION:**
+    ``CONFIGURE_ENABLE_CLASSIC_API_NOTEPADS`` should be defined if the
+    user wants to have support for Classic API Notepads in their application.
+
+**NOTES:**
+    Disabling Classic API Notepads saves the allocation of sixteen (16)
+    thirty-two bit integers. This saves sixty-four bytes per task/thread
+    plus the allocation overhead. Notepads are rarely used in applications
+    and this can save significant memory in a low RAM system. Classic API 
+    Notepads are deprecated, and this option has been removed from
+    post 4.11 versions of RTEMS.
+
 .. COMMENT: === CONFIGURE_MAXIMUM_TIMERS ===
 
 .. _Specify Maximum Classic API Timers: