Hi Christoph,

kernel test robot noticed the following build errors:

[auto build test ERROR on mst-vhost/linux-next]
[also build test ERROR on linus/master v6.15-rc4 next-20250430]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    
https://github.com/intel-lab-lkp/linux/commits/Christoph-Hellwig/vringh-use-bvec_kmap_local/20250430-220531
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next
patch link:    https://lore.kernel.org/r/20250430140004.2724391-1-hch%40lst.de
patch subject: [PATCH] vringh: use bvec_kmap_local
config: arm64-randconfig-003-20250501 
(https://download.01.org/0day-ci/archive/20250501/202505011754.rqgppza9-...@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project 
f819f46284f2a79790038e1f6649172789734ae8)
reproduce (this is a W=1 build): 
(https://download.01.org/0day-ci/archive/20250501/202505011754.rqgppza9-...@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <l...@intel.com>
| Closes: 
https://lore.kernel.org/oe-kbuild-all/202505011754.rqgppza9-...@intel.com/

All errors (new ones prefixed by >>):

>> drivers/vhost/vringh.c:1332:36: error: incompatible pointer types passing 
>> 'struct bio_vec *' to parameter of type 'struct page *' 
>> [-Werror,-Wincompatible-pointer-types]
    1332 |                 __virtio16 *to = kmap_local_page(&ivec.iov.bvec[0]);
         |                                                  ^~~~~~~~~~~~~~~~~
   include/linux/highmem.h:96:50: note: passing argument to parameter 'page' 
here
      96 | static inline void *kmap_local_page(struct page *page);
         |                                                  ^
   1 error generated.


vim +1332 drivers/vhost/vringh.c

  1304  
  1305  static inline int putu16_iotlb(const struct vringh *vrh,
  1306                                 __virtio16 *p, u16 val)
  1307  {
  1308          struct iotlb_vec ivec;
  1309          union {
  1310                  struct iovec iovec;
  1311                  struct bio_vec bvec;
  1312          } iov;
  1313          __virtio16 tmp;
  1314          int ret;
  1315  
  1316          ivec.iov.iovec = &iov.iovec;
  1317          ivec.count = 1;
  1318  
  1319          /* Atomic write is needed for putu16 */
  1320          ret = iotlb_translate(vrh, (u64)(uintptr_t)p, sizeof(*p),
  1321                                NULL, &ivec, VHOST_MAP_RO);
  1322          if (ret < 0)
  1323                  return ret;
  1324  
  1325          tmp = cpu_to_vringh16(vrh, val);
  1326  
  1327          if (vrh->use_va) {
  1328                  ret = __put_user(tmp, (__virtio16 __user 
*)ivec.iov.iovec[0].iov_base);
  1329                  if (ret)
  1330                          return ret;
  1331          } else {
> 1332                  __virtio16 *to = kmap_local_page(&ivec.iov.bvec[0]);
  1333  
  1334                  WRITE_ONCE(*to, tmp);
  1335                  kunmap_local(to);
  1336          }
  1337  
  1338          return 0;
  1339  }
  1340  

-- 
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https://github.com/intel/lkp-tests/wiki

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