drivers/vhost/vringh.c:567:18: sparse: sparse: cast to restricted __virtio16

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4df7c5fde316820286dfa6d203a1005d7fbe007d
commit: d877322bc1adcab9850732275670409e8bcca4c4 openrisc: Fix issue with get_user for 64-bit values
date:   3 years, 3 months ago
config: openrisc-randconfig-r131-20231102 (https://download.01.org/0day-ci/archive/20231209/202312090326.3IgZoXQW-lkp@xxxxxxxxx/config)
compiler: or1k-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231209/202312090326.3IgZoXQW-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312090326.3IgZoXQW-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
>> drivers/vhost/vringh.c:567:18: sparse: sparse: cast to restricted __virtio16
>> drivers/vhost/vringh.c:567:18: sparse: sparse: cast to restricted __virtio16
>> drivers/vhost/vringh.c:567:18: sparse: sparse: cast to restricted __virtio16
>> drivers/vhost/vringh.c:567:18: sparse: sparse: restricted __virtio16 degrades to integer
>> drivers/vhost/vringh.c:567:18: sparse: sparse: restricted __virtio16 degrades to integer
>> drivers/vhost/vringh.c:567:18: sparse: sparse: cast to restricted __virtio16
>> drivers/vhost/vringh.c:567:18: sparse: sparse: cast to restricted __virtio16

vim +567 drivers/vhost/vringh.c

f87d0fbb579818 Rusty Russell      2013-03-20  562  
f87d0fbb579818 Rusty Russell      2013-03-20  563  /* Userspace access helpers: in this case, addresses are really userspace. */
b9f7ac8c72894c Michael S. Tsirkin 2014-12-12  564  static inline int getu16_user(const struct vringh *vrh, u16 *val, const __virtio16 *p)
f87d0fbb579818 Rusty Russell      2013-03-20  565  {
b9f7ac8c72894c Michael S. Tsirkin 2014-12-12  566  	__virtio16 v = 0;
b9f7ac8c72894c Michael S. Tsirkin 2014-12-12 @567  	int rc = get_user(v, (__force __virtio16 __user *)p);
b9f7ac8c72894c Michael S. Tsirkin 2014-12-12  568  	*val = vringh16_to_cpu(vrh, v);
b9f7ac8c72894c Michael S. Tsirkin 2014-12-12  569  	return rc;
f87d0fbb579818 Rusty Russell      2013-03-20  570  }
f87d0fbb579818 Rusty Russell      2013-03-20  571  

:::::: The code at line 567 was first introduced by commit
:::::: b9f7ac8c72894c19bf258a54ecaa708df4ffbe80 vringh: update for virtio 1.0 APIs

:::::: TO: Michael S. Tsirkin <mst@xxxxxxxxxx>
:::::: CC: Michael S. Tsirkin <mst@xxxxxxxxxx>

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