Re: [Qemu-devel] [PATCH 24/24] hw/[u-x]*: pass owner to memory_region_init_io

["Andreas Färber" <afaerber@suse.de>]

Am 25.06.2013 16:15, schrieb Paolo Bonzini:
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>  hw/usb/hcd-ehci-sysbus.c   |  2 +-
>  hw/usb/hcd-ehci.c          |  8 ++++----
>  hw/usb/hcd-ohci.c          |  3 ++-
>  hw/usb/hcd-uhci.c          |  4 +++-
>  hw/usb/hcd-xhci.c          | 12 ++++++------
>  hw/virtio/virtio-pci.c     |  4 ++--
>  hw/watchdog/wdt_i6300esb.c |  3 ++-
>  hw/xen/xen_apic.c          |  4 ++--
>  hw/xen/xen_platform.c      |  7 ++++---
>  hw/xen/xen_pt.c            |  4 ++--
>  hw/xen/xen_pt_msi.c        |  3 ++-
>  hw/xtensa/xtensa_lx60.c    |  2 +-
>  12 files changed, 31 insertions(+), 25 deletions(-)
> 
> diff --git a/hw/usb/hcd-ehci-sysbus.c b/hw/usb/hcd-ehci-sysbus.c
> index 76b4c05..54147b5 100644
> --- a/hw/usb/hcd-ehci-sysbus.c
> +++ b/hw/usb/hcd-ehci-sysbus.c
> @@ -173,7 +173,7 @@ static void fusbh200_ehci_init(Object *obj)
>      FUSBH200EHCIState *f = FUSBH200_EHCI(obj);
>      EHCIState *s = &i->ehci;
>  
> -    memory_region_init_io(&f->mem_vendor, NULL, &fusbh200_ehci_mmio_ops, s,
> +    memory_region_init_io(&f->mem_vendor, OBJECT(f), &fusbh200_ehci_mmio_ops, s,
>                            "fusbh200", 0x4c);
>      memory_region_add_subregion(&s->mem,
>                                  s->opregbase + s->portscbase + 4 * s->portnr,
[snip]

I happened to notice that the scripted approach you describe in the
cover letter causes some unnecessary indirection here:
In this hunk a human could've just supplied the function argument obj.
But since OBJECT() is not a dynamic cast and f is referenced on the same
line for the MemoryRegion itself, I guess there is no harm in always
using OBJECT(f) for simplicity.

Regards,
Andreas

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