Re: [Qemu-devel] [PATCH v2 0/3] virtio: cross-endian helpers fixes

[Greg Kurz <gkurz@linux.vnet.ibm.com>]

On Wed, 23 Dec 2015 15:47:00 +0200
"Michael S. Tsirkin" <mst@redhat.com> wrote:

> On Thu, Dec 17, 2015 at 09:52:46AM +0100, Greg Kurz wrote:
> > This series tries to rework cross-endian helpers for better clarity.
> > It does not change behaviour, except perhaps patch 3/3 even if I could not
> > measure any performance gain.
> 
> Breaks build:
> 
>   CC    mips64-softmmu/hw/mips/mips_malta.o
> /home/mst/scm/qemu/hw/net/vhost_net.c: In function
> ‘vhost_net_set_vnet_endian’:
> /home/mst/scm/qemu/hw/net/vhost_net.c:208:10: error: implicit
> declaration of function ‘virtio_legacy_is_cross_endian’
> [-Werror=implicit-function-declaration]
>          (virtio_legacy_is_cross_endian(dev) &&
> !virtio_is_big_endian(dev))) {
>           ^
> /home/mst/scm/qemu/hw/net/vhost_net.c:208:9: error: nested extern
> declaration of ‘virtio_legacy_is_cross_endian’ [-Werror=nested-externs]
>          (virtio_legacy_is_cross_endian(dev) &&
> !virtio_is_big_endian(dev))) {
>          ^
> cc1: all warnings being treated as errors
> /home/mst/scm/qemu/rules.mak:57: recipe for target 'hw/net/vhost_net.o'
> failed
> make[1]: *** [hw/net/vhost_net.o] Error 1
> Makefile:186: recipe for target 'subdir-i386-softmmu' failed
> make: *** [subdir-i386-softmmu] Error 2
> 
> 
> please always build all architectures.
> 

Ok. I'll do so from now on.

> > ---
> > 
> > Greg Kurz (3):
> >       virtio: move cross-endian helper to vhost
> >       vhost: move virtio 1.0 check to cross-endian helper
> >       virtio: optimize virtio_access_is_big_endian() for little-endian targets
> > 
> > 
> >  hw/virtio/vhost.c                 |   22 ++++++++++++++++++----
> >  include/hw/virtio/virtio-access.h |   16 +++-------------
> >  2 files changed, 21 insertions(+), 17 deletions(-)
>