Re: vmlinux.o: warning: objtool: stackleak_erase()+0x35: call to ftrace_likely_update() leaves .noinstr.text section

[Steven Rostedt]

On Tue, 5 Apr 2022 10:03:35 +0200
Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

> > I think I'll just send a patch to nuke the tracer. I'm sure Peter Zijlstra
> > will be happy when I do that. But I still want the profiler, as I find that
> > useful.  
> 
> It'll explode the moment Lai's entry rework goes through. That'll make
> us run C code before we switch to the kernel address space, so your
> counters will not exist/be-mapped and *BOOM*.

We could black list those areas. Just add:

#define DISABLE_BRANCH_PROFILING at the top of any file and it will not
do the profiling.

-- Steve