[PATCH] ftrace: Allow to explicitly disable the build of the dynamic ftrace with regs
From: Petr Mladek
Date: Mon Feb 08 2016 - 10:03:03 EST
This patch allows to explicitly disable
CONFIG_DYNAMIC_FTRACE_WITH_REGS. We will need to do so on
PPC with a broken gcc. This situation will be detected at
buildtime and could not be handled by Kbuild automatically.
Also it fixes the prompt of DYNAMIC_FTRACE. The uppercase
better fits the style of the other menu entries.
This patch does not change the default value.
Signed-off-by: Petr Mladek <pmladek@xxxxxxxx>
Acked-by: Torsten Duwe <duwe@xxxxxx>
---
kernel/trace/Kconfig | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index a138f6d866ae..de6dab0f74f2 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -449,7 +449,7 @@ config PROBE_EVENTS
def_bool n
config DYNAMIC_FTRACE
- bool "enable/disable function tracing dynamically"
+ bool "Enable/Disable function tracing dynamically"
depends on FUNCTION_TRACER
depends on HAVE_DYNAMIC_FTRACE
default y
@@ -472,9 +472,17 @@ config DYNAMIC_FTRACE
otherwise has native performance as long as no tracing is active.
config DYNAMIC_FTRACE_WITH_REGS
- def_bool y
+ bool "Pass registers to function tracer"
depends on DYNAMIC_FTRACE
depends on HAVE_DYNAMIC_FTRACE_WITH_REGS
+ default y
+ help
+ This option enables passing the current state of processor
+ registers to the function tracer. It allows to do a more
+ detailed analyze and print more information.
+
+ Say Y here if you are unsure. The only exception is if
+ you want to pass a build error caused by a broken compiler.
config FUNCTION_PROFILER
bool "Kernel function profiler"
--
1.8.5.6