2fd7c761a2
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> |
||
|---|---|---|
| .. | ||
| Makefile | ||
| cache.c | ||
| cpuinfo-pvr-full.c | ||
| cpuinfo-static.c | ||
| cpuinfo.c | ||
| mb.c | ||
| pvr.c | ||