Hi "Michael, I love your patch! Yet something to improve: [auto build test ERROR on next-20200406] [also build test ERROR on v5.6] [cannot apply to vhost/linux-next linus/master linux/master v5.6 v5.6-rc7 v5.6-rc6] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Michael-S-Tsirkin/virtio-alignment-issues/20200407-025651 base: b2e2a818a01717ba15c74fd355f76822b81a95f6 config: nds32-defconfig (attached as .config) compiler: nds32le-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=9.3.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from include/linux/virtio.h:12, from include/linux/virtio_config.h:7, from include/uapi/linux/virtio_net.h:30, from include/linux/virtio_net.h:6, from net//packet/af_packet.c:82: >> include/linux/vringh.h:42:15: error: field 'vring' has incomplete type 42 | struct vring vring; | ^~~~~ vim +/vring +42 include/linux/vringh.h f87d0fbb579818 Rusty Russell 2013-03-20 20 f87d0fbb579818 Rusty Russell 2013-03-20 21 /* virtio_ring with information needed for host access. */ f87d0fbb579818 Rusty Russell 2013-03-20 22 struct vringh { b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 23 /* Everything is little endian */ b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 24 bool little_endian; b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 25 f87d0fbb579818 Rusty Russell 2013-03-20 26 /* Guest publishes used event idx (note: we always do). */ f87d0fbb579818 Rusty Russell 2013-03-20 27 bool event_indices; f87d0fbb579818 Rusty Russell 2013-03-20 28 f87d0fbb579818 Rusty Russell 2013-03-20 29 /* Can we get away with weak barriers? */ f87d0fbb579818 Rusty Russell 2013-03-20 30 bool weak_barriers; f87d0fbb579818 Rusty Russell 2013-03-20 31 f87d0fbb579818 Rusty Russell 2013-03-20 32 /* Last available index we saw (ie. where we're up to). */ f87d0fbb579818 Rusty Russell 2013-03-20 33 u16 last_avail_idx; f87d0fbb579818 Rusty Russell 2013-03-20 34 f87d0fbb579818 Rusty Russell 2013-03-20 35 /* Last index we used. */ f87d0fbb579818 Rusty Russell 2013-03-20 36 u16 last_used_idx; f87d0fbb579818 Rusty Russell 2013-03-20 37 f87d0fbb579818 Rusty Russell 2013-03-20 38 /* How many descriptors we've completed since last need_notify(). */ f87d0fbb579818 Rusty Russell 2013-03-20 39 u32 completed; f87d0fbb579818 Rusty Russell 2013-03-20 40 f87d0fbb579818 Rusty Russell 2013-03-20 41 /* The vring (note: it may contain user pointers!) */ f87d0fbb579818 Rusty Russell 2013-03-20 @42 struct vring vring; 3beee86a4b9374 Sjur Brændeland 2013-03-20 43 9ad9c49cfe970b Jason Wang 2020-03-26 44 /* IOTLB for this vring */ 9ad9c49cfe970b Jason Wang 2020-03-26 45 struct vhost_iotlb *iotlb; 9ad9c49cfe970b Jason Wang 2020-03-26 46 3beee86a4b9374 Sjur Brændeland 2013-03-20 47 /* The function to call to notify the guest about added buffers */ 3beee86a4b9374 Sjur Brændeland 2013-03-20 48 void (*notify)(struct vringh *); 3beee86a4b9374 Sjur Brændeland 2013-03-20 49 }; 3beee86a4b9374 Sjur Brændeland 2013-03-20 50 :::::: The code at line 42 was first introduced by commit :::::: f87d0fbb579818fed3eeb0923cc253163ab93039 vringh: host-side implementation of virtio rings. :::::: TO: Rusty Russell <rusty@xxxxxxxxxxxxxxx> :::::: CC: Rusty Russell <rusty@xxxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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