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* drivers/vhost/vdpa.c:303:13: sparse: expected unsigned int const
@ 2020-10-29 14:56 kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2020-10-29 14:56 UTC (permalink / raw)
  To: Tiwei Bie
  Cc: kbuild-all, linux-kernel, Michael S. Tsirkin, Eugenio Pérez,
	Jason Wang

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   ed8780e3f2ecc82645342d070c6b4e530532e680
commit: 4c8cf31885f69e86be0b5b9e6677a26797365e1d vhost: introduce vDPA-based backend
date:   7 months ago
:::::: branch date: 17 hours ago
:::::: commit date: 7 months ago
config: sh-randconfig-s031-20201028 (attached as .config)
compiler: sh4-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
        # apt-get install sparse
        # sparse version: v0.6.3-56-gc09e8239-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4c8cf31885f69e86be0b5b9e6677a26797365e1d
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 4c8cf31885f69e86be0b5b9e6677a26797365e1d
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=sh 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


"sparse warnings: (new ones prefixed by >>)"
   drivers/vhost/vdpa.c: note: in included file (through arch/sh/include/asm/unistd.h, include/uapi/linux/unistd.h, include/linux/compat.h, ...):
   ./arch/sh/include/generated/uapi/asm/unistd_32.h:411:37: sparse: sparse: no newline at end of file
   drivers/vhost/vdpa.c:303:13: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected unsigned int const *__gu_addr @@     got unsigned int [noderef] [usertype] <asn:1> * @@
>> drivers/vhost/vdpa.c:303:13: sparse:     expected unsigned int const *__gu_addr
   drivers/vhost/vdpa.c:303:13: sparse:     got unsigned int [noderef] [usertype] <asn:1> *
   drivers/vhost/vdpa.c:303:13: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const volatile [noderef] <asn:1> * @@     got unsigned int const *__gu_addr @@
   drivers/vhost/vdpa.c:303:13: sparse:     expected void const volatile [noderef] <asn:1> *
>> drivers/vhost/vdpa.c:303:13: sparse:     got unsigned int const *__gu_addr

vim +303 drivers/vhost/vdpa.c

4c8cf31885f69e8 Tiwei Bie 2020-03-26  290  
4c8cf31885f69e8 Tiwei Bie 2020-03-26  291  static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
4c8cf31885f69e8 Tiwei Bie 2020-03-26  292  				   void __user *argp)
4c8cf31885f69e8 Tiwei Bie 2020-03-26  293  {
4c8cf31885f69e8 Tiwei Bie 2020-03-26  294  	struct vdpa_device *vdpa = v->vdpa;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  295  	const struct vdpa_config_ops *ops = vdpa->config;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  296  	struct vdpa_callback cb;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  297  	struct vhost_virtqueue *vq;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  298  	struct vhost_vring_state s;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  299  	u8 status;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  300  	u32 idx;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  301  	long r;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  302  
4c8cf31885f69e8 Tiwei Bie 2020-03-26 @303  	r = get_user(idx, (u32 __user *)argp);
4c8cf31885f69e8 Tiwei Bie 2020-03-26  304  	if (r < 0)
4c8cf31885f69e8 Tiwei Bie 2020-03-26  305  		return r;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  306  
4c8cf31885f69e8 Tiwei Bie 2020-03-26  307  	if (idx >= v->nvqs)
4c8cf31885f69e8 Tiwei Bie 2020-03-26  308  		return -ENOBUFS;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  309  
4c8cf31885f69e8 Tiwei Bie 2020-03-26  310  	idx = array_index_nospec(idx, v->nvqs);
4c8cf31885f69e8 Tiwei Bie 2020-03-26  311  	vq = &v->vqs[idx];
4c8cf31885f69e8 Tiwei Bie 2020-03-26  312  
4c8cf31885f69e8 Tiwei Bie 2020-03-26  313  	status = ops->get_status(vdpa);
4c8cf31885f69e8 Tiwei Bie 2020-03-26  314  
4c8cf31885f69e8 Tiwei Bie 2020-03-26  315  	if (cmd == VHOST_VDPA_SET_VRING_ENABLE) {
4c8cf31885f69e8 Tiwei Bie 2020-03-26  316  		if (copy_from_user(&s, argp, sizeof(s)))
4c8cf31885f69e8 Tiwei Bie 2020-03-26  317  			return -EFAULT;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  318  		ops->set_vq_ready(vdpa, idx, s.num);
4c8cf31885f69e8 Tiwei Bie 2020-03-26  319  		return 0;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  320  	}
4c8cf31885f69e8 Tiwei Bie 2020-03-26  321  
4c8cf31885f69e8 Tiwei Bie 2020-03-26  322  	if (cmd == VHOST_GET_VRING_BASE)
4c8cf31885f69e8 Tiwei Bie 2020-03-26  323  		vq->last_avail_idx = ops->get_vq_state(v->vdpa, idx);
4c8cf31885f69e8 Tiwei Bie 2020-03-26  324  
4c8cf31885f69e8 Tiwei Bie 2020-03-26  325  	r = vhost_vring_ioctl(&v->vdev, cmd, argp);
4c8cf31885f69e8 Tiwei Bie 2020-03-26  326  	if (r)
4c8cf31885f69e8 Tiwei Bie 2020-03-26  327  		return r;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  328  
4c8cf31885f69e8 Tiwei Bie 2020-03-26  329  	switch (cmd) {
4c8cf31885f69e8 Tiwei Bie 2020-03-26  330  	case VHOST_SET_VRING_ADDR:
4c8cf31885f69e8 Tiwei Bie 2020-03-26  331  		if (ops->set_vq_address(vdpa, idx,
4c8cf31885f69e8 Tiwei Bie 2020-03-26  332  					(u64)(uintptr_t)vq->desc,
4c8cf31885f69e8 Tiwei Bie 2020-03-26  333  					(u64)(uintptr_t)vq->avail,
4c8cf31885f69e8 Tiwei Bie 2020-03-26  334  					(u64)(uintptr_t)vq->used))
4c8cf31885f69e8 Tiwei Bie 2020-03-26  335  			r = -EINVAL;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  336  		break;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  337  
4c8cf31885f69e8 Tiwei Bie 2020-03-26  338  	case VHOST_SET_VRING_BASE:
4c8cf31885f69e8 Tiwei Bie 2020-03-26  339  		if (ops->set_vq_state(vdpa, idx, vq->last_avail_idx))
4c8cf31885f69e8 Tiwei Bie 2020-03-26  340  			r = -EINVAL;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  341  		break;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  342  
4c8cf31885f69e8 Tiwei Bie 2020-03-26  343  	case VHOST_SET_VRING_CALL:
4c8cf31885f69e8 Tiwei Bie 2020-03-26  344  		if (vq->call_ctx) {
4c8cf31885f69e8 Tiwei Bie 2020-03-26  345  			cb.callback = vhost_vdpa_virtqueue_cb;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  346  			cb.private = vq;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  347  		} else {
4c8cf31885f69e8 Tiwei Bie 2020-03-26  348  			cb.callback = NULL;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  349  			cb.private = NULL;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  350  		}
4c8cf31885f69e8 Tiwei Bie 2020-03-26  351  		ops->set_vq_cb(vdpa, idx, &cb);
4c8cf31885f69e8 Tiwei Bie 2020-03-26  352  		break;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  353  
4c8cf31885f69e8 Tiwei Bie 2020-03-26  354  	case VHOST_SET_VRING_NUM:
4c8cf31885f69e8 Tiwei Bie 2020-03-26  355  		ops->set_vq_num(vdpa, idx, vq->num);
4c8cf31885f69e8 Tiwei Bie 2020-03-26  356  		break;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  357  	}
4c8cf31885f69e8 Tiwei Bie 2020-03-26  358  
4c8cf31885f69e8 Tiwei Bie 2020-03-26  359  	return r;
4c8cf31885f69e8 Tiwei Bie 2020-03-26  360  }
4c8cf31885f69e8 Tiwei Bie 2020-03-26  361  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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2020-10-29 14:56 drivers/vhost/vdpa.c:303:13: sparse: expected unsigned int const kernel test robot

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