On Sat, 31 Mar 2018 02:22:35 +0800 kbuild test robot <[email protected]> wrote:
> reproduce:
> # apt-get install sparse
> make ARCH=x86_64 allmodconfig
> make C=1 CF=-D__CHECK_ENDIAN__
[...]
> 417
> 418 static bool __virtnet_xdp_xmit(struct virtnet_info *vi,
> 419 struct xdp_buff *xdp)
> 420 {
[...]
> 445
> 446 /* Make room for virtqueue hdr (also change
> xdpf->headroom?) */
> 447 xdpf->data -= vi->hdr_len;
> 448 /* Zero header and leave csum up to XDP layers */
> 449 hdr = xdpf->data;
> 450 memset(hdr, 0, vi->hdr_len);
> > 451 hdr->hdr.hdr_len = xdpf->len; /* Q: is this needed? */
I'll just remove this line, as Jason previously told me that it is not
strictly necessary (so lets avoid playing with endianness here).
> 452 xdpf->len += vi->hdr_len;
> 453
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
