RE: [patch 3/3] x86/vector/msi: Select CONFIG_GENERIC_IRQ_RESERVATION_MODE

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On Tue, 17 Oct 2017, Dexuan Cui wrote:

> > From: Thomas Gleixner [mailto:tglx@xxxxxxxxxxxxx]
> > Sent: Tuesday, October 17, 2017 12:55 AM
> > --- a/arch/x86/Kconfig
> > +++ b/arch/x86/Kconfig
> > @@ -95,7 +95,7 @@ config X86
> >  	select GENERIC_IRQ_MATRIX_ALLOCATOR	if X86_LOCAL_APIC
> >  	select GENERIC_IRQ_MIGRATION		if SMP
> >  	select GENERIC_IRQ_PROBE
> > -	select GENERIC_IRQ_SHOW
> > +	select GENERIC_IRQ_RESERVATION_MODE
> >  	select GENERIC_PENDING_IRQ		if SMP
> >  	select GENERIC_SMP_IDLE_THREAD
> >  	select GENERIC_STRNCPY_FROM_USER
> 
> Hi Thomas,
> It looks you removed GENERIC_IRQ_SHOW by accident?

Indeed. My patch foo today is more than bad....

> I got this build error:
> ...
>   LD      vmlinux.o
>   MODPOST vmlinux.o
> fs/proc/interrupts.o:(.rodata+0x118): undefined reference to `show_interrupts'
> Makefile:1000: recipe for target 'vmlinux' failed
> make: *** [vmlinux] Error 1
> 
> Adding GENERIC_IRQ_SHOW back can fix the build failure, and with the
> pachset Hyper-V PCI pass-through can work fine.

Thanks for testing.

       tglx
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