RE: [PATCH 1/1] X86: mshyperv.c: Fix a compilation issue.

[KY Srinivasan]

> -----Original Message-----
> From: Greg KH [mailto:gregkh@xxxxxxxxxxxxxxxxxxx]
> Sent: Thursday, August 6, 2015 2:11 PM
> To: KY Srinivasan <kys@xxxxxxxxxxxxx>
> Cc: linux-kernel@xxxxxxxxxxxxxxx; devel@xxxxxxxxxxxxxxxxxxxxxx;
> vkuznets@xxxxxxxxxx; sfr@xxxxxxxxxxxxxxxx; tglx@xxxxxxxxxxxxx;
> mingo@xxxxxxxxxx; hpa@xxxxxxxxx; x86@xxxxxxxxxx; Haiyang Zhang
> <haiyangz@xxxxxxxxxxxxx>
> Subject: Re: [PATCH 1/1] X86: mshyperv.c: Fix a compilation issue.
> 
> On Thu, Aug 06, 2015 at 02:41:24PM -0700, K. Y. Srinivasan wrote:
> > Building with a random configuration file, this build failure
> > was reported:
> >
> > arch/x86/built-in.o: In function `hv_machine_crash_shutdown':
> > arch/x86/kernel/cpu/mshyperv.c:112: undefined
> > reference to `native_machine_crash_shutdown'
> >
> > This patch fixes the problem
> >
> > Reported-by: Jim Davis <jim.epost@xxxxxxxxx>
> > Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
> > ---
> >  arch/x86/kernel/cpu/mshyperv.c |    2 ++
> >  1 files changed, 2 insertions(+), 0 deletions(-)
> >
> > diff --git a/arch/x86/kernel/cpu/mshyperv.c
> b/arch/x86/kernel/cpu/mshyperv.c
> > index f794bfa..0faed5e0 100644
> > --- a/arch/x86/kernel/cpu/mshyperv.c
> > +++ b/arch/x86/kernel/cpu/mshyperv.c
> > @@ -109,7 +109,9 @@ static void hv_machine_crash_shutdown(struct
> pt_regs *regs)
> >  {
> >  	if (hv_crash_handler)
> >  		hv_crash_handler(regs);
> > +#ifdef CONFIG_KEXEC_CORE
> >  	native_machine_crash_shutdown(regs);
> > +#endif
> 
> Why is kexec the factor here?  And if it really does, can't it just be
> CONFIG_KEXEC, or, can kexec provide a "dummy" inline function so that
> you don't have to have a #ifdef in a .c file?

Greg,

I am on vacation till next Tuesday. I will address your concern after I get back if Vitaly
has not addressed it by then.

Regards,

K. Y

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