Re: [PATCH 0/2] s390 vs. kprobes on ftrace

[Heiko Carstens]

On Thu, Oct 16, 2014 at 02:49:56PM +0900, Masami Hiramatsu wrote:
> Hi Heiko,
> 
> (2014/10/16 0:46), Heiko Carstens wrote:
> > Hi all,
> > 
> > we would like to implement an architecture specific variant of "kprobes
> > on ftrace" without using the current HAVE_KPROBES_ON_FTRACE infrastructure
> > which is currently only used by x86.

[...]

> I'm not sure about s390 nor have the machine, so it is very helpful if you
> give us a command line level test and show us the result with this patch :)
> Fortunately, we already have ftracetest under tools/tesitng/selftest/ftrace/.
> You can add the testcase for checking co-existence of kprobes and ftrace on
> an entry of a function.

So how about something like below?