From 2fd7c761a24c28e83d7194b4b4a099451126a503 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Mon, 16 Nov 2009 09:40:14 +0100 Subject: microblaze: ftrace: add static function tracer If -pg of gcc is enabled with CONFIG_FUNCTION_TRACER=y. a calling to _mcount will be inserted into each kernel function. so, there is a possibility to trace the kernel functions in _mcount. This patch add the specific _mcount support for static function tracing. by default, ftrace_trace_function is initialized as ftrace_stub(an empty function), so, the default _mcount will introduce very little overhead. after enabling ftrace in user-space, it will jump to a real tracing function and do static function tracing for us. Commit message from Wu Zhangjin Signed-off-by: Michal Simek --- arch/microblaze/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/microblaze/Kconfig') diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index 57eeaa60ca69..18003ca08196 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -6,6 +6,7 @@ mainmenu "Linux/Microblaze Kernel Configuration" config MICROBLAZE def_bool y select HAVE_LMB + select HAVE_FUNCTION_TRACER select USB_ARCH_HAS_EHCI select ARCH_WANT_OPTIONAL_GPIOLIB -- cgit v1.2.3