Re: [Xen-users] CONFIG_PCI_MSI and drivers/xen/events.c

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, Nov 09, 2009 at 05:40:11PM +0100, Bartosz Lis wrote:
> Hello,
> 
> I try to compile pv_ops domU kernel taken from 
> http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=shortlog;h=xen/master
> and I'm getting:
> 
> ---cut here--
>   CC      drivers/xen/grant-table.o
>   CC      drivers/xen/features.o
>   CC      drivers/xen/events.o
> /root/rpm/BUILD/kernel-
> xenUnogrsecurity-2.6.31.5x/linux-2.6.31/drivers/xen/events.c:597: error: 
> redefinition of 'xen_destroy_irq'
> /root/rpm/BUILD/kernel-
> xenUnogrsecurity-2.6.31.5x/linux-2.6.31/arch/x86/include/asm/xen/pci.h:22: 
> note: previous definition of 'xen_destroy_irq' was here
> /root/rpm/BUILD/kernel-
> xenUnogrsecurity-2.6.31.5x/linux-2.6.31/drivers/xen/events.c:666: error: 
> redefinition of 'xen_create_msi_irq'
> /root/rpm/BUILD/kernel-
> xenUnogrsecurity-2.6.31.5x/linux-2.6.31/arch/x86/include/asm/xen/pci.h:16: 
> note: previous definition of 'xen_create_msi_irq' was here
> make[4]: *** [drivers/xen/events.o] Error 1
> make[3]: *** [drivers/xen] Error 2
> make[2]: *** [drivers] Error 2
> make[1]: *** [sub-make] Error 2
> 
> The problem occured during last few days.
> 
> The above error arises when:
> XEN_DOM0_PCI - not set
> PCI_MSI=y
> The last is automticaly selected by AMD_IOMMU.
> 
> The error does not arise when XEN_DOM0_PCI=y, what is usually set when one 
> compiles dom0 kernel. 
> 
> Please tell me, whether it makes sense to leave AMD_IOMMU=y when compiling 
> domU kernel. If not, I'll simply switch that symbol off.
> 
> When XEN_DOM0_PCI is not set arch/x86/include/asm/xen/pci.h defines 
> xen_create_msi_irq and xen_destroy_irq as inlines. Having PCI_MSI or 
> AMD_IOMMU 
> set causes drivers/xen/events.c to define these as functions with nontrivial 
> body confilicting with the inlines. 
> 

There's a patch here:
http://lists.xensource.com/archives/html/xen-devel/2009-11/msg00458.html

-- Pasi


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