drivers/vhost/vhost.c:1014:16: sparse: sparse: cast to restricted __virtio16

From: kbuild test robot
Date: Fri May 15 2020 - 01:34:18 EST

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Previous message: Andy Lutomirski: "Re: [patch V4 part 4 19/24] x86/entry: Implement user mode C entry points for #DB and #MCE"
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Hi Jason,

First bad commit (maybe != root cause):

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 1ae7efb388540adc1653a51a3bc3b2c9cef5ec1a
commit: 20c384f1ea1a0bc7320bc445c72dd02d2970d594 vhost: refine vhost and vringh kconfig
date: 6 weeks ago
reproduce:
# apt-get install sparse
# sparse version: v0.6.1-193-gb8fad4bc-dirty
git checkout 20c384f1ea1a0bc7320bc445c72dd02d2970d594
make ARCH=x86_64 allmodconfig
make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@xxxxxxxxx>

sparse warnings: (new ones prefixed by >>)

drivers/vhost/vhost.c:753:17: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] <asn:1> * @@ got n:1> * @@
drivers/vhost/vhost.c:753:17: sparse: expected void [noderef] <asn:1> *
drivers/vhost/vhost.c:753:17: sparse: got void *
drivers/vhost/vhost.c:753:17: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] <asn:1> * @@ got n:1> * @@
drivers/vhost/vhost.c:753:17: sparse: expected void [noderef] <asn:1> *
drivers/vhost/vhost.c:753:17: sparse: got void *
drivers/vhost/vhost.c:753:17: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] <asn:1> * @@ got n:1> * @@
drivers/vhost/vhost.c:753:17: sparse: expected void [noderef] <asn:1> *
drivers/vhost/vhost.c:753:17: sparse: got void *
drivers/vhost/vhost.c:937:16: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *addr @@ got restricted __virtio16 [noderef] <asvoid *addr @@
drivers/vhost/vhost.c:937:16: sparse: expected void *addr
drivers/vhost/vhost.c:937:16: sparse: got restricted __virtio16 [noderef] <asn:1> *
drivers/vhost/vhost.c:900:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] <asn:1> *addr @@ got n:1> *addr @@
drivers/vhost/vhost.c:900:42: sparse: expected void [noderef] <asn:1> *addr
drivers/vhost/vhost.c:900:42: sparse: got void *addr
drivers/vhost/vhost.c:753:17: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] <asn:1> * @@ got n:1> * @@
drivers/vhost/vhost.c:753:17: sparse: expected void [noderef] <asn:1> *
drivers/vhost/vhost.c:753:17: sparse: got void *
drivers/vhost/vhost.c:922:16: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *addr @@ got restricted __virtio16 [noderef] [usertype] <asvoid *addr @@
drivers/vhost/vhost.c:922:16: sparse: expected void *addr
drivers/vhost/vhost.c:922:16: sparse: got restricted __virtio16 [noderef] [usertype] <asn:1> *
drivers/vhost/vhost.c:900:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] <asn:1> *addr @@ got n:1> *addr @@
drivers/vhost/vhost.c:900:42: sparse: expected void [noderef] <asn:1> *addr
drivers/vhost/vhost.c:900:42: sparse: got void *addr
drivers/vhost/vhost.c:753:17: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] <asn:1> * @@ got n:1> * @@
drivers/vhost/vhost.c:753:17: sparse: expected void [noderef] <asn:1> *
drivers/vhost/vhost.c:753:17: sparse: got void *
>> drivers/vhost/vhost.c:1014:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:1014:16: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *addr @@ got restricted __virtio16 [noderef] <asvoid *addr @@
drivers/vhost/vhost.c:1014:16: sparse: expected void *addr
drivers/vhost/vhost.c:1014:16: sparse: got restricted __virtio16 [noderef] <asn:1> *
>> drivers/vhost/vhost.c:1014:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:900:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] <asn:1> *addr @@ got n:1> *addr @@
drivers/vhost/vhost.c:900:42: sparse: expected void [noderef] <asn:1> *addr
drivers/vhost/vhost.c:900:42: sparse: got void *addr
drivers/vhost/vhost.c:753:17: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] <asn:1> * @@ got n:1> * @@
drivers/vhost/vhost.c:753:17: sparse: expected void [noderef] <asn:1> *
drivers/vhost/vhost.c:753:17: sparse: got void *
drivers/vhost/vhost.c:989:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:989:16: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *addr @@ got restricted __virtio16 [noderef] <asvoid *addr @@
drivers/vhost/vhost.c:989:16: sparse: expected void *addr
drivers/vhost/vhost.c:989:16: sparse: got restricted __virtio16 [noderef] <asn:1> *
drivers/vhost/vhost.c:989:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:900:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] <asn:1> *addr @@ got n:1> *addr @@
drivers/vhost/vhost.c:900:42: sparse: expected void [noderef] <asn:1> *addr
drivers/vhost/vhost.c:900:42: sparse: got void *addr
drivers/vhost/vhost.c:753:17: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] <asn:1> * @@ got n:1> * @@
drivers/vhost/vhost.c:753:17: sparse: expected void [noderef] <asn:1> *
drivers/vhost/vhost.c:753:17: sparse: got void *
drivers/vhost/vhost.c:995:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:995:16: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *addr @@ got restricted __virtio16 [noderef] <asvoid *addr @@
drivers/vhost/vhost.c:995:16: sparse: expected void *addr
drivers/vhost/vhost.c:995:16: sparse: got restricted __virtio16 [noderef] <asn:1> *
drivers/vhost/vhost.c:995:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:900:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] <asn:1> *addr @@ got n:1> *addr @@
drivers/vhost/vhost.c:900:42: sparse: expected void [noderef] <asn:1> *addr
drivers/vhost/vhost.c:900:42: sparse: got void *addr
drivers/vhost/vhost.c:753:17: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] <asn:1> * @@ got n:1> * @@
drivers/vhost/vhost.c:753:17: sparse: expected void [noderef] <asn:1> *
drivers/vhost/vhost.c:753:17: sparse: got void *
drivers/vhost/vhost.c:944:16: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *addr @@ got restricted __virtio16 [noderef] <asvoid *addr @@
drivers/vhost/vhost.c:944:16: sparse: expected void *addr
drivers/vhost/vhost.c:944:16: sparse: got restricted __virtio16 [noderef] <asn:1> *
drivers/vhost/vhost.c:900:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] <asn:1> *addr @@ got n:1> *addr @@
drivers/vhost/vhost.c:900:42: sparse: expected void [noderef] <asn:1> *addr
drivers/vhost/vhost.c:900:42: sparse: got void *addr
drivers/vhost/vhost.c:753:17: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] <asn:1> * @@ got n:1> * @@
drivers/vhost/vhost.c:753:17: sparse: expected void [noderef] <asn:1> *
drivers/vhost/vhost.c:753:17: sparse: got void *
drivers/vhost/vhost.c:1002:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:1002:16: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *addr @@ got restricted __virtio16 [noderef] <asvoid *addr @@
drivers/vhost/vhost.c:1002:16: sparse: expected void *addr
drivers/vhost/vhost.c:1002:16: sparse: got restricted __virtio16 [noderef] <asn:1> *
drivers/vhost/vhost.c:1002:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:900:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] <asn:1> *addr @@ got n:1> *addr @@
drivers/vhost/vhost.c:900:42: sparse: expected void [noderef] <asn:1> *addr
drivers/vhost/vhost.c:900:42: sparse: got void *addr
drivers/vhost/vhost.c:753:17: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] <asn:1> * @@ got n:1> * @@
drivers/vhost/vhost.c:753:17: sparse: expected void [noderef] <asn:1> *
drivers/vhost/vhost.c:753:17: sparse: got void *
drivers/vhost/vhost.c:1008:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:1008:16: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *addr @@ got restricted __virtio16 [noderef] [usertype] <asvoid *addr @@
drivers/vhost/vhost.c:1008:16: sparse: expected void *addr
drivers/vhost/vhost.c:1008:16: sparse: got restricted __virtio16 [noderef] [usertype] <asn:1> *
drivers/vhost/vhost.c:1008:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:900:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] <asn:1> *addr @@ got n:1> *addr @@
drivers/vhost/vhost.c:900:42: sparse: expected void [noderef] <asn:1> *addr
drivers/vhost/vhost.c:900:42: sparse: got void *addr
drivers/vhost/vhost.c:753:17: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] <asn:1> * @@ got n:1> * @@
drivers/vhost/vhost.c:753:17: sparse: expected void [noderef] <asn:1> *
drivers/vhost/vhost.c:753:17: sparse: got void *
drivers/vhost/vhost.c:989:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:989:16: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *addr @@ got restricted __virtio16 [noderef] <asvoid *addr @@
drivers/vhost/vhost.c:989:16: sparse: expected void *addr
drivers/vhost/vhost.c:989:16: sparse: got restricted __virtio16 [noderef] <asn:1> *
drivers/vhost/vhost.c:989:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:900:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] <asn:1> *addr @@ got n:1> *addr @@
drivers/vhost/vhost.c:900:42: sparse: expected void [noderef] <asn:1> *addr
drivers/vhost/vhost.c:900:42: sparse: got void *addr
drivers/vhost/vhost.c:753:17: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] <asn:1> * @@ got n:1> * @@
drivers/vhost/vhost.c:753:17: sparse: expected void [noderef] <asn:1> *
drivers/vhost/vhost.c:753:17: sparse: got void *
drivers/vhost/vhost.c:989:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:989:16: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void *addr @@ got restricted __virtio16 [noderef] <asvoid *addr @@
drivers/vhost/vhost.c:989:16: sparse: expected void *addr
drivers/vhost/vhost.c:989:16: sparse: got restricted __virtio16 [noderef] <asn:1> *
drivers/vhost/vhost.c:989:16: sparse: sparse: cast to restricted __virtio16
drivers/vhost/vhost.c:900:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void [noderef] <asn:1> *addr @@ got n:1> *addr @@
drivers/vhost/vhost.c:900:42: sparse: expected void [noderef] <asn:1> *addr
drivers/vhost/vhost.c:900:42: sparse: got void *addr
drivers/vhost/vhost.c:753:17: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] <asn:1> * @@ got n:1> * @@
drivers/vhost/vhost.c:753:17: sparse: expected void [noderef] <asn:1> *
drivers/vhost/vhost.c:753:17: sparse: got void *

vim +1014 drivers/vhost/vhost.c

7b5d753ebc22c5 Jason Wang 2019-05-24 1010
7b5d753ebc22c5 Jason Wang 2019-05-24 1011 static inline int vhost_get_used_idx(struct vhost_virtqueue *vq,
7b5d753ebc22c5 Jason Wang 2019-05-24 1012 __virtio16 *idx)
7b5d753ebc22c5 Jason Wang 2019-05-24 1013 {
7b5d753ebc22c5 Jason Wang 2019-05-24 @1014 return vhost_get_used(vq, *idx, &vq->used->idx);
7b5d753ebc22c5 Jason Wang 2019-05-24 1015 }
7b5d753ebc22c5 Jason Wang 2019-05-24 1016

:::::: The code at line 1014 was first introduced by commit
:::::: 7b5d753ebc22c5b6935a70ce9a857dc6220784f8 vhost: fine grain userspace memory accessors

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

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

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