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

DISCUSSION Mike Galbraith 2 participants 2 messages Jul 6, 2017

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Mike Galbraith

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2017-07-06 14:09 UTC #0 lore raw

Greetings,

I'm seeing $subject in master as of this merge window. I 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.

-Mike

Josh Poimboeuf

2017-07-06 14:31 UTC #1 lore raw

Quoted 7 lines · Mike Galbraith

Greetings,
I'm seeing $subject in master as of this merge window. I 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.

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Josh