Re: [PATCH] virtio_pci: fix macro exported in uapi

2013-05-20 Thread David Howells
Rusty Russell wrote: > The point of the patch is that it's unusable: > > #define VIRTIO_PCI_CONFIG(dev)((dev)->msix_enabled ? 24 : 20) > > ie. it's accessing a member of the kernel's virtio_pci_dev structure. Ah, okay. In that case, zap it and see if anyone complains. David -

Re: [PATCH] virtio_pci: fix macro exported in uapi

2013-05-19 Thread Rusty Russell
David Howells writes: > Rusty Russell wrote: > >> Macro still isn't usable, because userspace can't know whether it's the >> new or old. >> >> We need to either remove it from UAPI, or rename it to >> VIRTIO_PCI_CONFIG_OFF. > > Surely, if userspace is using it as is, you can't remove it, rename

Re: [PATCH] virtio_pci: fix macro exported in uapi

2013-05-17 Thread David Howells
Rusty Russell wrote: > Macro still isn't usable, because userspace can't know whether it's the > new or old. > > We need to either remove it from UAPI, or rename it to > VIRTIO_PCI_CONFIG_OFF. Surely, if userspace is using it as is, you can't remove it, rename it or alter it? David -- To unsub

Re: [PATCH] virtio_pci: fix macro exported in uapi

2013-05-16 Thread Rusty Russell
"Michael S. Tsirkin" writes: > macro VIRTIO_PCI_CONFIG except in the unlikely event userspace > actually has a structure with a field named msix_enabled. > Get the msix_enabled by value instead, to make it useful > for userspace. > > Signed-off-by: Michael S. Tsirkin Macro still isn't usable, be