| Date | Fri, 4 Mar 2022 21:22:25 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v3 00/39] x86: Kernel IBT |
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On Fri, Mar 04, 2022 at 11:09:58AM -0800, Josh Poimboeuf wrote:
> I'm getting some warnings with CONFIG_X86_KERNEL_IBT=n: > > arch/x86/entry/entry_64.o: warning: objtool: irq_entries_start()+0x7: unreachable instruction > arch/x86/kernel/ftrace_64.o: warning: objtool: return_to_handler()+0x2a: unreachable instruction
Urgh, lemme go chase that.
> And a warning with CONFIG_X86_KERNEL_IBT=y: > > vmlinux.o: warning: objtool: .text+0xaf0: unreachable instruction
This is that weak symbol issue :/ We talked about it on IRC, but i've not yet come around to fixing it.
This is mostly a pre-existing issue, only uncovered because we run on vmlinux more..
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