[powerpc] ftrace warning kernel/trace/ftrace.c:2068 with code-patching selftests

[Sachin Sant]

> On 24-Jan-2022, at 10:15 PM, Steven Rostedt <rostedt at goodmis.org> wrote:
> 
> On Mon, 24 Jan 2022 20:15:06 +0800
> Yinan Liu <yinan at linux.alibaba.com> wrote:
> 
>> Hi, Steven and Sachin
>> 
>> I don't have a powerpc machine for testing, I guess the ppc has a 
>> similar problem with the s390. It's not clear to me why the compiler 
>> does this. Maybe we can handle ppc like you did with the s390 before, 
>> but I'm not sure if other architectures have similar issues. Or limit 
>> BUILDTIME_MCOUNT_SORT to a smaller scope and make it only available for 
>> x86 and arm?
>> 
>> steven, what's your opinion?
> 
> Yeah, I think it's time to opt in, instead of opting out.
> 
> Something like this:
> 
Thanks. This fixes the reported problem.

Tested-by: Sachin Sant <sachinp at linux.ibm.com>

- Sachin