diff --git a/examples/hidkbd/Kconfig b/examples/hidkbd/Kconfig
index 81f817ef9..011383b9a 100644
--- a/examples/hidkbd/Kconfig
+++ b/examples/hidkbd/Kconfig
@@ -6,6 +6,7 @@
 config EXAMPLES_HIDKBD
 	bool "USB HID keyboard example"
 	default n
+	depends on !BUILD_PROTECTED && !BUILD_KERNEL
 	---help---
 		Enable the USB HID keyboard example
 
diff --git a/examples/ostest/fpu.c b/examples/ostest/fpu.c
index 47b668524..c0a60c086 100644
--- a/examples/ostest/fpu.c
+++ b/examples/ostest/fpu.c
@@ -55,7 +55,10 @@
 
 #undef HAVE_FPU
 #ifdef CONFIG_ARCH_FPU
-#  if defined(CONFIG_EXAMPLES_OSTEST_FPUSIZE) && defined(CONFIG_SCHED_WAITPID) && !defined(CONFIG_DISABLE_SIGNALS)
+#  if defined(CONFIG_EXAMPLES_OSTEST_FPUSIZE) && \
+      defined(CONFIG_SCHED_WAITPID) && \
+      !defined(CONFIG_DISABLE_SIGNALS) && \
+      defined(CONFIG_BUILD_FLAT)
 #    define HAVE_FPU 1
 #  else
 #    ifndef CONFIG_EXAMPLES_OSTEST_FPUSIZE
@@ -67,6 +70,9 @@
 #    ifdef CONFIG_DISABLE_SIGNALS
 #      warning "FPU test not built; CONFIG_DISABLE_SIGNALS defined"
 #    endif
+#    ifndef CONFIG_BUILD_FLAT
+#      warning "FPU test not built; Only available in the flat build (CONFIG_BUILD_FLAT)"
+#    endif
 #  endif
 #endif
 
@@ -88,7 +94,7 @@
 #  define CONFIG_EXAMPLES_OSTEST_FPUSTACKSIZE 2048
 #endif
 
-/* Other defintions ****************************************************/
+/* Other definitions ***************************************************/
 /* We'll keep all data using 32-bit values only to force 32-bit alignment.
  * This logic has no real notion of the underlying representation.
  */
diff --git a/examples/touchscreen/Kconfig b/examples/touchscreen/Kconfig
index b75546c8b..e266972b6 100644
--- a/examples/touchscreen/Kconfig
+++ b/examples/touchscreen/Kconfig
@@ -46,6 +46,7 @@ config EXAMPLES_TOUCHSCREEN_MOUSE
 config EXAMPLES_TOUCHSCREEN_ARCHINIT
 	bool "Architecture-specific initialization"
 	default y
+	depends on !BUILD_PROTECTED && !BUILD_KERNEL
 	---help---
 		By default, the touchscreen example will call arch_tcinitialize() to
 		register the touchscreen device before it attempts to open it.
@@ -54,7 +55,7 @@ config EXAMPLES_TOUCHSCREEN_ARCHINIT
 
 		This works well for the typical touchscreen controller but there are
 		other devices that cannot be initialized and uninitialized in this
-		fashion.  Consider a USB mouse, fo example.  The USB mouse will be
+		fashion.  Consider a USB mouse, for example.  The USB mouse will be
 		registered when the mouse is connected and unregistered when the
 		mouse is disconnected.
 
@@ -64,4 +65,12 @@ config EXAMPLES_TOUCHSCREEN_ARCHINIT
 		de-selected, then the arch_tcinitialize() and arch_tcuninitialize() will
 		never be called.
 
+		NOTE also that the functions arch_tcinitialize() and
+		arch_tcuninitialize() are effective non-standard operating system
+		calls.  This is cheap shortcut and a violation of the OS interface.
+		You can get away with this in the flat build (CONFIG_BUILD_FLAT),
+		but not in the protected or kernel builds (CONFIG_BUILD_PROTECTED
+		or CONFIG)BUILD_KERNEL).  In those cases, you will need to perform
+		one-time touchscreen initialization in board_initialize().
+
 endif