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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 /sound/synth
parenta3cd613b2e775eb59816c2c7c49c038d54917208 (diff)
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 'sound/synth')
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