On 25 February 2015 at 02:16, Alex Williamson <alex.williamson@xxxxxxxxxx> wrote: > vga_set_legacy_decoding() is defined in drivers/gpu/vga/vgaarb.c, > which is only compiled with CONFIG_VGA_ARB. A caller would > therefore get an undefined symbol if the VGA arbiter is not > enabled. Acked-by: Dave Airlie <airlied@xxxxxxxxxx> > Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx> > --- > > I'd like to use this function from vfio-pci to opt-out VGA devices > from arbitration if vfio-pci VGA support is disabled. This helps to > keep DRI2 enabled on the host if additional GPUs are installed for > VMs and used without VGA support. I can pull this change in through > my tree if someone wants to provide just an ack. Thanks! > > include/linux/vgaarb.h | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/include/linux/vgaarb.h b/include/linux/vgaarb.h > index c37bd4d..8c3b412 100644 > --- a/include/linux/vgaarb.h > +++ b/include/linux/vgaarb.h > @@ -65,8 +65,13 @@ struct pci_dev; > * out of the arbitration process (and can be safe to take > * interrupts at any time. > */ > +#if defined(CONFIG_VGA_ARB) > extern void vga_set_legacy_decoding(struct pci_dev *pdev, > unsigned int decodes); > +#else > +static inline void vga_set_legacy_decoding(struct pci_dev *pdev, > + unsigned int decodes) { }; > +#endif > > /** > * vga_get - acquire & locks VGA resources > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel