On Sat, 16 Jan 2021 10:59:26 +0800 Xuan Zhuo wrote: > + idx = sq->xsk.hdr_con % sq->xsk.hdr_n;
The arguments here are 64 bit, this code will not build on 32 bit machines: ERROR: modpost: "__umoddi3" [drivers/net/virtio_net.ko] undefined! There's also a sparse warning in this patch: drivers/net/virtio_net.c:2704:16: warning: incorrect type in assignment (different address spaces) drivers/net/virtio_net.c:2704:16: expected struct virtnet_xsk_hdr *xskhdr drivers/net/virtio_net.c:2704:16: got struct virtnet_xsk_hdr [noderef] __rcu *
