Re: arch/x86/kernel/ftrace.o: warning: objtool: ftrace_modify_code_direct()+0x2d: sibling call from callable instruction with modified stack frame

From: Josh Poimboeuf
Date: Thu Jul 06 2017 - 10:31:52 EST

On Thu, Jul 06, 2017 at 04:09:18PM +0200, Mike Galbraith wrote:
> Greetings,
> I'm seeing $subject in master as of this merge window. ÂI don't see it
> with my usual stripped down PREEMPT_VOLUNTARY or an enterprise-ish
> NOPREEMPT config, but do see it with the attached, derived from my
> enterprise-ish PREEMPT_RT config after running make oldconfig on it,
> and reproducing the warning in virgin source.

Thanks, looks like an objtool bug. Will fix.