stacktrace.c:(.text+0x1b0): undefined reference to `.smp_send_safe_nmi_ipi'

[Nicholas Piggin]

On Thu, 14 Jun 2018 12:51:28 +0200
Christophe LEROY <christophe.leroy at c-s.fr> wrote:

> Le 14/06/2018 à 12:25, Nicholas Piggin a écrit :
> > On Thu, 14 Jun 2018 12:06:51 +0200
> > Christophe LEROY <christophe.leroy at c-s.fr> wrote:
> >   
> >> See http://kisskb.ellerman.id.au/kisskb/buildresult/13395345/ for details
> >>
> >> Seems like that function only exists when CONFIG_NMI_IPI is defined.
> >>
> >> Problem introduced by commit 5cc05910f26e6fd6da15f052f86f6150e4b91664
> >> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/arch/powerpc/kernel/stacktrace.c?h=next-20180614&id=5cc05910f26e6fd6da15f052f86f6150e4b91664
> >>
> >>
> >> What do you recommend to fix that ?  
> > 
> > We could just do smp_call_function in the case we have no NMI_IPI?  
> 
> ???
> 
> Can you detail what you have in mind ? Do smp_call_function() to call 
> what ? Instead of the call to smp_send_safe_nmi_ipi() ?

Yes I was thinking that but now I take a better look there's places that
call it with irqs off so that might be a bit risky. I guess just making
it depend on NMI_IPI for now is the minimum fix.

Thanks,
Nick