drivers/vhost/vhost.c:718:3: error: call to '__compiletime_assert_718' declared with attribute error: BUILD_BUG_ON failed: __alignof__ *vq->avail > VRING_AVAIL_ALIGN_SIZE

[kbuild test robot]

Hi Michael,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
master
head:   67944024c1cdd897e49a09b0d6af3ea38d1388ca
commit: 5d9a07b0de512b77bf28d2401e5fe3351f00a240 vhost: relax used address 
alignment
date:   1 year, 2 months ago
config: openrisc-allyesconfig (attached as .config)
reproduce:
        wget 
https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross
 -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 5d9a07b0de512b77bf28d2401e5fe3351f00a240
        # save the attached .config to linux build tree
        make.cross ARCH=openrisc 

All errors (new ones prefixed by >>):

   drivers/vhost/vhost.c: In function 'vhost_vring_ioctl':
>> drivers/vhost/vhost.c:718:3: error: call to '__compiletime_assert_718' 
>> declared with attribute error: BUILD_BUG_ON failed: __alignof__ *vq->avail > 
>> VRING_AVAIL_ALIGN_SIZE

vim +/__compiletime_assert_718 +718 drivers/vhost/vhost.c

   712                      (u64)(unsigned long)a.avail_user_addr != 
a.avail_user_addr) {
   713                          r = -EFAULT;
   714                          break;
   715                  }
   716  
   717                  /* Make sure it's safe to cast pointers to vring types. 
*/
 > 718                  BUILD_BUG_ON(__alignof__ *vq->avail > 
 > VRING_AVAIL_ALIGN_SIZE);
   719                  BUILD_BUG_ON(__alignof__ *vq->used > 
VRING_USED_ALIGN_SIZE);
   720                  if ((a.avail_user_addr & (VRING_AVAIL_ALIGN_SIZE - 1)) 
||
   721                      (a.used_user_addr & (VRING_USED_ALIGN_SIZE - 1)) ||

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