markers: Add samples subdir

Begin infrastructure for kernel code samples in the samples/ directory.
Add its Kconfig and Kbuild files.
Source its Kconfig file in all arch/ Kconfigs.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 16 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 529b9048d97e..68ef80b30340 100644
--- a/Makefile
+++ b/Makefile
@@ -774,6 +774,9 @@ vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o
 ifdef CONFIG_HEADERS_CHECK
         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 endif
+ifdef CONFIG_SAMPLES
+        $(Q)$(MAKE) $(build)=samples
+endif
         $(call vmlinux-modpost)
         $(call if_changed_rule,vmlinux__)
         $(Q)rm -f .old_version
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 7d16e6433302..c567f219191d 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -498,3 +498,5 @@ config FAULT_INJECTION_STACKTRACE_FILTER
         select FRAME_POINTER
         help
           Provide stacktrace filter for fault-injection capabilities
+
+source "samples/Kconfig"
diff --git a/samples/Kconfig b/samples/Kconfig
new file mode 100644
index 000000000000..b46b4cf4382f
--- /dev/null
+++ b/samples/Kconfig
@@ -0,0 +1,11 @@
+# samples/Kconfig
+
+menuconfig SAMPLES
+        bool "Sample kernel code"
+        help
+          You can build and test sample kernel code here.
+
+if SAMPLES
+
+
+endif # SAMPLES