tracing: create menuconfig for tracing infrastructure

During testing we often use randconfig to test various kernels.
The current configuration set up does not give an easy way to disable
all tracing with a single config. The case where randconfig would
test all tracing disabled is very unlikely.

This patch adds a config option to enable or disable all tracing.
It is hooked into the tracing menu just like other submenus are done.

[ Impact: allow randconfig to easily produce all traces disabled ]

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 3ee28db69be6ced04e0b15d026c1d602bee81aa6..3fa36d2bc290523c5c73dfe413f9f8e56245172d 100644 (file)
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -77,7 +77,12 @@ config TRACING_SUPPORT
 
 if TRACING_SUPPORT
 
-menu "Tracers"
+menuconfig FTRACE
+       bool "Tracers"
+       help
+        Enable the kernel tracing infrastructure.
+
+if FTRACE
 
 config FUNCTION_TRACER
        bool "Kernel Function Tracer"
@@ -462,7 +467,7 @@ config MMIOTRACE_TEST
 
          Say N, unless you absolutely know what you are doing.
 
-endmenu
+endif # FTRACE
 
 endif # TRACING_SUPPORT