ftrace: add have dynamic ftrace config for archs

Now that ftrace is being ported to other architectures, it has become
apparent that DYNAMIC_FTRACE is dependent on whether or not that
architecture implements dynamic ftrace. FTRACE itself may be ported to
an architecture without porting dynamic ftrace.

This patch adds HAVE_DYNAMIC_FTRACE to allow architectures to port ftrace
without having to also port the dynamic aspect as well.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index f3005717bcd0..5c2295b29f2c 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -4,6 +4,9 @@
 config HAVE_FTRACE
         bool
 
+config HAVE_DYNAMIC_FTRACE
+        bool
+
 config TRACER_MAX_TRACE
         bool
 
@@ -94,6 +97,7 @@ config CONTEXT_SWITCH_TRACER
 config DYNAMIC_FTRACE
         bool "enable/disable ftrace tracepoints dynamically"
         depends on FTRACE
+        depends on HAVE_DYNAMIC_FTRACE
         default y
         help
          This option will modify all the calls to ftrace dynamically