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authorMichal Simek <monstr@monstr.eu>2009-11-16 09:40:14 +0100
committerMichal Simek <monstr@monstr.eu>2009-12-14 08:40:09 +0100
commit2fd7c761a24c28e83d7194b4b4a099451126a503 (patch)
treec8647ae1bc4519649e35e46b231f3f2af77f9a76 /arch/microblaze/Kconfig
parenta3cd613b2e775eb59816c2c7c49c038d54917208 (diff)
downloadlinux-2fd7c761a24c28e83d7194b4b4a099451126a503.tar.gz
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 <wuzhangjin@gmail.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/Kconfig')
-rw-r--r--arch/microblaze/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 57eeaa60ca6..18003ca0819 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